QGIS 3.0a - Getting Started | Mike Miller | Skillshare

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QGIS 3.0a - Getting Started

teacher avatar Mike Miller

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Taught by industry leaders & working professionals
Topics include illustration, design, photography, and more

Watch this class and thousands more

Get unlimited access to every class
Taught by industry leaders & working professionals
Topics include illustration, design, photography, and more

Lessons in This Class

11 Lessons (1h 9m)
    • 1. Introduction

      8:56
    • 2. A note about open source software

      6:20
    • 3. What is QGIS exactly?

      7:39
    • 4. Installing QGIS

      5:38
    • 5. Exploring the interface

      4:27
    • 6. Toolbars and Panels

      3:17
    • 7. QGIS Plugins

      6:15
    • 8. Coordinate Reference Systems

      9:11
    • 9. Measuring and identifying

      5:30
    • 10. Panning, zooming, and bookmarks

      6:02
    • 11. What happens when you save a project?

      5:47
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About This Class

This class well get you started understanding what QGIS is, why you would want to use it, and how the interface is organized.

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Mike Miller

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Hello, I'm Mike.

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Related Skills

Technology Data Science Gis QGIS

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Transcripts

1. Introduction: Hello and welcome to this course Cugini s 3.0 for G. I s professionals. My name is Mike, and I will be the primary instructor for the scores. I'm really excited about it because interesting Q G. I s is growing rapidly in the industry for many reasons, and I think it's great software. It's not perfect, but I don't think there's any perfect software out there and what it does. I think it does really, really well, one thing that I do want to make clear right up front, though, is that I am not anti our G i s or anti as re by any means. RTs is pretty amazing software, and I think every is a great company. My background is a natural resource. Conservation and X rays done a lot of for that sector through his conservation grant program and support for the Society for Conservation. G. I s I have no problem with every selling commercial Delia software. There's nothing wrong with that. They say much created the industry and they continue to invest a lot of money pushing the boundaries with what's possible, and you shouldn't expect them to do that for free, and I do actually own in Arcuri s license, and I continue paying several $100 a year for maintenance about to keep doing that. It comes in really handy sometimes, although the more use kgs and get used to it, I find the lesson less that I go back to using RGs Some of that's personal preference. A lot of it is that I work a lot in developing nations and a lot of my clients prefer to use Q G. I s. And while I'm not anti are curious, I am very much pro que GREs and pro open source software. I just think it's a beautiful thing to see users come together and create this product from the bottom up and have it do exactly what the users wanted to do and make it available for free. Because I'm a fan of G. I s in general, I consider myself a G s professional, not a narc US professional, and I believe that there's a need in any industry of a competition to keep suffer developers on their terrorists. I also believe that GREs professionals should be aware of all the tools that are available to them and understand when and where to use them. Is this course progressive? I'll be pointing out some of the advantages that I think you g i s has over RGs. But I also point out some of the advantages that are curious has over Q g. I s My goal is not to try to talk you into using one of the other just to provide an honest assessment of each program. Strength and weaknesses, not the disparity, either one for any kind of personal or financial reasons. I'm gonna try and have to come across that way. But if I do, please remember that I'm just excited about Q g I s I'm not trying to put down as your product in any way. I think there's an important over both in the industry, and I think that both be around for a long time. So who is this course for? Basically, it's for anyone who's some familiarity with the basic concepts of G. I s and the RTs in particular. But I will be pointing out places were accused. Us. 3.0 difference from Cuba is two point whatever as well, So users of older versions of Q G. I s can also benefit from this course. You might be a student who learned RTs in school and you're now trying to find work. Maybe doing some contract work and can afford to purchase are curious, So you might need access to Cugini s In order to continue your learning, we'll get some work done without having to invest a lot of money up front. You might be a nontraditional liner who's trying to learn on their own without access to university computers, with RTs already installed on them. Well, you may be a student in some country where RGs is difficult to access, but praise to hide for local economic conditions. You might be a J s professional with a lot of experience was interested in learning about the potential of other tools and the G I s toolkit because when your boss decides you to do something, you want to get it done as quickly and efficiently as possible. That means you need to be able to choose the right tool for the job. Or maybe your Js professional who's tasked with doing something that requires a level of licensing higher than their provided with at work. I've been in that boat several times where I had to tell my balls. We would need to upgrade our licenses or by an extension at a cost of several $1000 just to perform one simple task. And, of course, my bosses were never happy about that. Well, you might be a GS developers frustrated with having the tools that they develop, become obsolete with time, or having your tools require that the users purchase expensive software because Cugini S is free and very easy to install. If your clients have to use it, at least they will have to pay anything. You go through a really complicated installation procedure. You can also have multiple versions of Q G. I s on a single computer. So if the tools that you develop born function in a new version of Q G, I s, the user can keep the old version on their computer until you have a chance to upgrade your tool. And the lack of that ability has been a real problem for me in the past. As a developer of RTs plug ins, this is also much less likely to happen because you Js plug ins don't rely on commercial third party libraries or frameworks in the way that RTs relies on Microsoft's DOT net framework in visual studio development environment. And finally, you might be a Macintosh. Your linens user wants to be able to work with G. I s software on non Windows computers and can use our key ideas because of its dependence on Microsoft Windows. Because Cugini s is actually available in both Mac and then X platforms. And there's even a port of Cugini s for the android operating system in the works. Now there are several reasons why you might want to use q t I as even if you already have access to RTs que. GREs supports almost every spatial data format in existence. Even some important ones that are curious does not handle well like DOJ, sahn and G P X. It uses the open source D D A. L libraries for raster data and no GR libraries perfected data so it can handle pretty much any data that those libraries support, which is virtually everything and because it uses the standard libraries rather than proprietary code, works very well. In fact, even every software uses D D A. L and O g r Under the hood for some operations. Cugini s support spatial databases such as post G I s and spatial Light natively. It also supports special data stored in other databases such a sequel server and Oracle. This means that it can support multi user editing. So if you have a large project that requires multiple people to be editing the same data simultaneously, you can do this in Q GREs for free. This also means that you can use spatial sequel queries to access and analyze your data right in the database, and this tends to be faster and more robust. And if you're interested in expanding your knowledge to include sequel and database technologies, your skills that are in great demand by employers, this is a great way to learn without the need for installing complicated and expensive software on a dedicated server. Specially also works great is a data store for sending data to other people because it's compact and is a single file. And for that reason, it also works great as a data store for small Web based GS applications. Que joyous supports raster processing operations natively If you find yourself occasionally needing to generate slope Aspect Hill shade or Contour maps or do some map algebra, but not enough to justify purchasing this spatial analyst extension for our G I s. You can do all of that in Q g. I s for free. Que gos also supports in vector operations that require advanced licensing in our G I s such a simplifying polygons and other dear processing tools. And finally, Q g i s integrates well with several of open source GS software packages. Grass works very well when you need to work with vector data that requires topology and both grass and soggy. I s have some rest of processing tools that are not included in our G i s. And even better, both grass and soggy s tools can be included in the queue GS graphical model or interface that provides similar functionality to the RTs model builder. So you can build models that includes not just tools that available natively in Q g i s but tools that are available in grass in saga as well. So in summary, besides having his own very powerful GREs functionality, Q g. I s acts like the glue that ties together several other open source software packages like D. D. A. L post shi'ias grass and soggy I s. And it puts them all in one consistent graphical user interface, and this is very little that you cannot do with it. So hopefully that explains why I'm excited about Q g s and why I'm so excited to share its capabilities with other people. My goal for the courses to keep things simple enough that new users could watch it the whole way through to let most of what they need to know. And, perhaps more importantly, to understand the specific terminology that Q G I issues is so they can find out how to do things that might not be included in this course. But I also wanted to keep the lectures somewhat independent of one another, so that it might serve as a reference for more advanced users who may want to search for a specific need that they might have and not have to watch the entire course to do that. So thanks for listening. We'll see you in the next lecture, which will be about the philosophy behind open source software 2. A note about open source software: Welcome back students. I wanted to take a few minutes to talk a little bit about open source software and what it means because huge ES is open source, and I think there's a lot of confusion about the term. First of all, open source is not the same as freeware or shareware. The only thing that they have in common really is that the software doesn't cost any money upfront, freeware and shareware or business models that became popular in the 19 nineties. But it's important to understand that generally, they were still a business model undertaking by people who were trying to earn money other by providing a reduced set of features for free and then charging money for a more complete version. Well, sometimes they included advertisements with the free version, and we're offer a paid version with no ads. Sometimes they were simply asked for donations. Nothing. These were developed by single users, and I'll refer to it as the garage tinkerer model. But that's not what open sources at all. Open source is better thought of conceptually is crowd sourcing a software project in this case, rather than a single developer working alone in his garage to develop something that he wants to earn some money on. There is a community of developers, each of whom is contributing a little bit of the expertise to improve the product. There's a lot of theory as to how this crowd sourcing approach is often the quickest way to arrive at the optimal solution to a problem. Let's look at a couple of examples of open source software projects first, so let's ask the question. Who? You just open source software? And the answer is that we all do. Oftentimes, we just don't know it. In fact, the World Wide Web is driven largely by open source software. There are commercial solutions to, but by far the majority of the content on the Web is hosted on the Knicks servers, and the Knicks is an open source operating system. The Web server software that runs on those computers with the Limits operating system is usually open. Source is well Apache in, and Gen X makes up almost 75% of all Web server content, and both of those open source. Microsoft's II s Web server, which is a commercial room server, comes in at a distant third over 80% of Web pages that ever server component use PHP as a service side language. And PHP is an open source project. My sequel, Post Grace Equal and Mongo DB of three important database programs that they used for dynamic Web pages, and they're all open source projects. There are other examples as well. Wikipedia is an open source online encyclopedia that has come to dominate the Web. It's not perfect, but it's so good because of all the user contributed content that it would be virtually impossible for commercial encyclopedia to compete. In fact, I don't even know if any are still trying. That used to be several. The our program for statistical analysis has really come to dominate the field of statistics in Data Analytics. Python is a very popular high level programming language, and it's also an open source project. And many commercial software packages also rely on open source software. For instance, I believe every still uses the G D A L libraries for loading raster and Vector GNS data, and there's a large philosophical difference between commercial software and open source software. Commercial software takes a top down approach. Decisions are made at the top and directives are passed down the line when issues occur, they need to be discussed to meeting. Need to be called decisions have to be made about the best of courage and all that stuff takes a lot of time and energy, and often times they need to drive. Sales is the motivating factor behind which approach is taken, and therefore marketing departments will always one additional bells and whistles that can be advertised sometimes at the expense of efficient work flows and robustness of the core software capabilities. Open source software takes a bottom up approach. It's individuals that respond to perceived weaknesses in a software and fix them without anyone telling them what to do. The motivating factor is generally the need for solid, robust solutions that just simply work well. So you might ask the question. Why would anyone contribute the time for free to an open source project? Well, it's been shown that this open source model works very well for developing robust applications that simply work well. This is appealing to many people who may have frustrations with feature loaded commercial software that does a lot of things, but sometimes it not implemented that well, so workflow is a little clunky with the program crashes too often things like that. Now it's worth noting that many large open source projects are managed by a foundation, nothing with donations from commercial companies, because commercial companies like to be able to sponsor features on demand as they need them. And open source projects can handle requests like this easier than commercial software occurred. So the point is that a lot of the larger open source projects that we're familiar with Do you have some sort of structure about getting things done? And they have paid staff managing everything this bottom up approach, where changes are made by users and motivated by the need for bus secure solutions, a one reason why so many very large applications like the World Wide Web are built around an open source backbone. It's not just the cost is that these solutions just simply work very well. Now many people have concerns about how they were going to get support for open source software if this at a company that they can call, and that's certainly a valid concern. But it's not as hard as you might think. There are actually many options available. First of all, you can't actually purchase commercial support packages for open source software. For example, Boundless Geo provide support packages for Q G, I S and other open source geospatial applications. And there are many sources for commercial training and consulting services as well. There's often a wide array of online resource is as well, such as users, manuals, forms, tutorials. You can often find classes such as this one, etcetera. And of course, there are many YouTube videos available for specific topics and books for more general topics. And if you have a very specific problem and you can't find an answer for, you can google your question, and chances are you'll find that someone has already asked it on Stack Exchange. And it's probably not just a single answer, but a whole variety of answers in a discussion about the pluses and minuses of each. But I found that that's really useful as a learning tool to help understand what's really going on. So in summary, where that's a reasonable concern in reality, For any open source project of reasonable popularity, you'll have no problem getting support from the user community well from commercial suppliers if you want to go that route. So thanks for listening. In the next lecture, I'm going to go into a little bit more detail. About what exactly? Q G i s is where it fits in the G I s world and how it compares to the products that you might be familiar with in the every ecosystem. We'll see you then. 3. What is QGIS exactly?: welcome back students in this electoral attempt to enter the question What exactly is Cugini s? Because this class is oriented towards people with experience in the every ecosystem of products. They may not be certain exactly what Cugini s canoe and how it compares to every products. So the short answer is that Q G s is the functional equivalent of our key I s desktop in the every ecosystem. It comes with both Q g I s desktop, which is where we'll spend 95% of our time and it's what we think of as desktop G. I s similar to arc map and it also comes with the Q G. I s browser, which is used to help manage D. I s data. And it's similar in functionality to our catalogue. But really cute G I s is much more than that because Q g. I s is open source and free to download and use. There were no licensed levels like what exists in the RTs ecosystem. These were originally called arcview arc Editor and Arc Info, and it for several confusing changes. I believe it there now referred to his RGs basic RTs standard and are curious, advanced. But this concept does not exist in Q G. I asked. Any functionality that exists can be used by anyone, so you'll never be told that you lack the licensing levels necessary to perform some geo processing or editing tasks. For the same reason. There are no commercial extensions to Q. GREs so you can perform most of the rest of processing functions that are included in spatial analysts and Cugini s for no charge. At the time that I'm reading this, I have not seen the official release of Huge ES three point. Oh, but my understanding is that it has the ability to render three D view similar to Arc seen . But even earlier versions have the ability to do things like generate contra lines, hill shades and few sheds. Swells generates Slope and Aspect masters from digital elevation models, so it includes much of the functionality of three D analysts as well as well as some network analysis functions. There are also some funky that Q J s can perform that would require the data interoperability extension in the every ecosystem. Q. T s was originally developed to be a viewer and editor for data that is stored in post docs Post yes, is a spatial extension to the post grace equal database and allows restoring an analysis of both vector and RASTER data in an open source enterprise level database. And if you're familiar with every products, you might recognize this as the same thing that Arc Ste provides for several commercial databases as well as post Grace equal. So cute D I s includes functionality similar to Arc Ste. As well. And this is pretty amazing because it allows you to do multi user editing right out of the box. That's something that requires our g i s that stop standard licensing at $7000 per editor in the every ecosystem post us also functions very well as a background for red mapping applications. And so, where there's not anything that corresponds exactly to Arcuri s online or archaea server, Now there is a queue G. I s server, and from the middle I've seen it seems to be very well integrated into Q G s three point. Oh, but I haven't seen a whole lot of documentation on it. I've never used it. So maybe towards the end of the course. I'll look into that and provide a lesson on that as well. With a little ingenuity and some other open source software packages, you can achieve a lot of the same functionality that these provide and without any user fees or subscriptions required. And if you're just interested in publishing static data into our Web page, there's a very good extension called qg Esther Web that allows you to bundle up both the Web page in the interface as well as a data and hosted on your own server. And there are no fees of any kind associated with that. Que Js also includes an excellent plug in called semi automatic classification that provides a lot of remote sensing type functionality. Right in Q g. I s now I'm not going to tell you that q g i s can do everything that all of those products can do because, honestly, I've never had to do a lot of the things that those products can do, so I can't speak with certainty about all the details of what it can and can't do in every single case. But I think it's safe to say that you would need advanced level licensing in RTs Desktop plus Special analyst three D analyst, network analyst. The Data interoperability extension Our guest ee RTs online with who knows how many subscriptions and rt a server to do everything that q g I s can do. That's really impressive, if you ask me Now let's approach the question of what Q G I s is from a different angle. We talked a little bit about general philosophical differences between open source and commercial software in the last lecture. But now I want to talk about some of the more specific differences in philosophy between q g I s and are curious you d I s attempts to leverage existing open source geospatial projects as much as possible. Rather than reinventing the wheel, it integrates standard of purchase that have stood the test of time. This includes projects like G D. A, l and O G. R for reading, transforming and re projecting both. Raster in Vector data sets the Geos Library that defined standard methods for defining relationships between vector features and special operations that can be performed on them . We've already talked a bit about post ups and some of its capabilities but it's another open source project that is tightly integrated into Q G. I s. And in a previous lecture I mentioned that grass and saga G I. S or to other open source GREs packages that have been around for a long time and have a lot of specific tools that are developed for them. And they have both included with the standard distribution of Q G i s. But their tools can also be accessed from within the Q g i s user interface. So cute ES provides a consistent user interface to all of these open source packages. Q g. I s also strives to adhere to the standards set by the open Geospatial consortium. It's likely that any new standards that they said will be implemented in Q g. I s first before they appear in any commercial package. In accordance with its open source philosophy, Q. J. S relies on a very active developer community that extends the functionality of the core Cugini s software through the creation of user created plug ins. And these plug ins are available right from the huge US menu system. In my experience, if there's some functionality that you need. It's highly likely that someone else is needed it before you, and you may very well find it in the plug ins. In fact, there's so many plug ins, it may be a little bit daunting to find what you need, and that brings us to the downside of the Q. T s. A perch as we have the luxury of having a lot of top down control over teams of programmers , and thus they've created a very smooth and consistent user interface. And they have so much control over this offer, they can hide some of the details from the user. Q. G. I s, on the other hand, because of its reliance on packages written by other people, has less control over the details. And so to some users, it may appear to be a little bit more complicated and not always consistent. And that can create some confusion your times and because they allow user created plug ins , there can also be multiple approaches to solving a single problem, and you may have to do some experimentation to decide which one is best suited to your needs. And this could be a little bit daunting in time consuming because there's a lot of variability in the skill levels of programmers. So it's gonna be a lot of variability in the quality of some of the plug ins that are created now. In my opinion, the flexibility afforded by this approach is worth the downsides. But I'll let you decide for yourself whether or not you agree with that. And so that's the end of this lecture. The next lecture were open to G. I s and start exploring the user interface and we'll see you then. 4. Installing QGIS: Welcome back, students. This lecture is going to be about downloading Installing Q G. I s And this is probably gonna be a really sure actor because Q g I s is ridiculously easy to install. And when Q t s 3.0 actually comes out, I'll probably be redoing this. It was supposed to be released today, which is December 8th and up until two weeks ago, that was still on the release schedule. But they decided to push it back for a little bit, and I don't actually know when it's actually going to be released. But the release candidate that the calling version 2.99 has had a feature free since October 27th. That means that they're not adding new features and not going to change the user interface . Just working to do a lot more testing and get some more user input. So if you go to Q. G, I s dot organ, that's org to take you to this website. And if you get to this panel, it says, get ready for q T. I s three tested with these candidate. Now you can go down here and get the development version for your operating system. So if we click on that, it takes us to this page. If we scroll up, we can see the days that they're expecting any new release to come out. And so the show the 2.99 had the future freeze on began on October 27th. They don't show when 3.0 might be available. Expected will be weeks rather than months. But I don't really have any information right now. I thought it was gonna be released today, and I planned this course to be available when it was released. And I'm gonna go ahead and visa anyway, because, like I said has had a feature freeze is not gonna be any change to the interface. So I think the videos will still be valid. It may be that some of the bugs that I found when I was developing this course are fixed. I know some of them have already been fixed. We'll be updating the courses that happens. But for now, this is the final word on any potential release date. And down the bottom of this page you have the location of the pre releases and I'm sorry if you're running on Mac or Lennix, I can't really help you, but you can go. And there's detailed instructions here. I don't actually have AH Macintosh or will the Knicks. All they have are Windows computers. If you have Windows, have a couple options. One is the USG O installer and that can install a number of open source do US packages. Besides, Q G. I s What I've been doing is just going to the weekly release candidate. And if I click on that and I'm actually going to scroll up, there's some information here on installing the latest 2.99 reviews candidate from the USG 04 w installer never get you the very latest nightly release What I found to be easiest. It's just going to the weekly snapshot. So click on here and they will take me to this spread page and you'll see that every Monday there's a new release. What I have on my computer right now is version 2.99 point 48 I'm gonna go ahead and install the latest that was released this Monday. That's 2.99 point 49 and so I have to do is click on here and it will start downloading. I already have it downloaded, however, so I'm just gonna go to my downloads directory and cook on the standalone installer. It's right there. In depending on what version of windows you're running, you're probably get some kind of noticed asking you to verify that you want to allow the information to take place. So click Yes, No. I already had an older version of 2.99 on the system, so it's going to go ahead and uninstall that for me. You probably won't get this message, but if you do keep up with installing the previous versions, you might get it the next time. So I'm just going to click next to go ahead and uninstall my old version. Quick un install again, and it's going through and deleting all those files and what is done on installing you get this message So you just click finish, and then we'll get the message to install the new version. And this is probably all that you'll see so you can read the Q. G s license information. When you're done reading it just quick. You you agree you have a choice here about installing some of the sample data sets that are available. I actually already have these on my machine, so I'm not going to install them and they're just click install and wait for it to finish. And then when it's done, you just click finish. Now that took about 10 minutes on my computer, edited the video to save you the pain of sitting there watching 10 minutes of file installation. So don't be alarmed if it takes longer and you try and do it yourself. And then once you have it installed on Windows 10 you should find it are there in your recently added we're most used. Or you can scroll on down alphabetically. Two huge areas. Two point night now and start running it. Joe. Use cued US desktop 2.99 with grass. And there you have it. That actually took about 45 seconds on my computer to get there. So again, don't be alarmed if the special green doesn't show up immediately, and there you have it already had some recent projects in there. It didn't lose those when I reinstalled the new version. So really It's not substantially different than any other software that you install. There's no complications with any kind of license manager anything like that. So thanks for listening and we'll see you in the next lecture. 5. Exploring the interface: Welcome back, students. In this lecture, we're going to stop talking about Q G. I s and actually start using it. But before we do that, I'm gonna let up a map in our G I s. It would take a look at it in the interface that you're probably used to. And then we'll take a look at a map document with the same data in Q G. I asked, and I think you'll see that there's a lot of similarity between the two. So in helping dark matter, See, I have one map here under my recent existing maps. And if I click on open sea, we have some data on the background. If you're taking my other courses especially my course on displaying and analysing Diaz data on the Web with leaflet, your you might recognize this data set. It's just some data from some work idea two years ago for an environmental consulting company that involved evaluating the impacts of some oil and gas projects on some animal species that had some environmental constraints. So there's a project layer that it shows different types of projects. Then there's four different types of environmental constraints. It's blurring al appetite, bald eagle nests, rapture nests and herring. Gregory's and then of this data is actually riel. The motivation for the data is realist. There's a real project that I worked on, but the data is actually faked. So don't go out here and expecting there to be an eagle's nest or pipeline or anything like that. I just thought it was a good sample data set to use for demonstration purposes. You'll see we have the name of the document that's open appear to have a menu bar. We have some tool bars, and the tool bars give us access to things like opening and saving a map document zooming and panning around selecting features. There's unidentified tool that you see some of the attributes behind some of this data. A measure tool. I have a scale box here. We can see the current scale or change of scale if we want down. Here is the refresh button. It's just the same marked map in a face that you're used to seeing. You've probably been using it for years, maybe even decades, of your as old as I am. Now let's take a look at q G. I s in a close art map and I'm gonna open Q G. I s And the first thing you'll see, it shows us recent projects that I've worked on that I've saved have another one called overview, just like arc map. It's a different file. It just has the same name and it has the same data. And I spent a little bit of time to make sure that the data was symbolized in a similar fashion. So it's the exact same data set, and you notice the interface is very similar as well. In the upper left, we have the name of the map. It's overview. We have a menu bar. Then we have some tool bars and allow you Teoh open and save map layers of some of the same tools to zoom in or pan around the map. It works the same way you can hover over any of these tools and see, just like anarchy. I s see what the tool is. We can zoom in, and now we can go back and forth between the most recent zoom levels, etcetera. Down here you have a scale box, just like we did knock map and just like an arc map. We can change the scale to do you think we wanted We could take been accustomed scale. So we also have unidentified tool That's great out because we don't have a layer selected. We have a select features tool. We have a measurement old, just like in our G I s help buttons so more That's the same kind of stuff. Now, if you look in your course, resource is you should see a file called Q G. I s for RGs dot zip that contains a directory with that same name. And in it you'll find the shape files under the data behind this. You also see in MX defile called overview dot mx d and that's the Ark map document. And it's also an overview Dark Yugi s document And that's the equivalent of an MX d for q g i s. It contains all the styling information as well as links to the data and some other things like the current map view and that kind of stuff pretty much the same. Is it annexed? E and I would encourage you to take some time and open both of these anarchy. I s as well as Q G I s and play around with the documents for yourself. This, um zooming and panning and use your information tool in the measure tools and just get familiar with how everything works. So if nothing else, it should ease your mind right away that working in Q g I as a lot of the tools that you use day in and day out, I'm not going to be that different in the R and r G I s That's gonna be it for this lecture . In the next lecture will look a little bit more detail on some of the panels and tool bars that are available and how you can rearrange them to suit your purpose. We'll see you then. 6. Toolbars and Panels: Welcome back. It's like two. We're gonna take a little more detail. Look at some of the customization you can do to your screen with tool bars and panels. You should be pretty familiar with tool bars. And Archie, I asked you, just go to the customize menu button and under tool bars, and there is a bunch of tool bars that you can add to your map. For instance, you're referencing toolbar. You could add a data driven pages toolbar, and then these two bars you can take in place pretty much anywhere you want. So I just place the data driven tool bars up here. You can also leave it undocked and move it around anywhere you want. But you can put it on the side. If you wanted, you can put it on the bottom, put it all the way over here in the left side. So you have a lot of flexibility about which two bars you want to have available and where you want them to be. Now we also have some things like we have the table of contents. Obviously, this is just a list of layers that are available, and we have ah our catalogue windows. Well, we can turn that on and off in our G I s. There's a search window, and these also can be moved around or their top You can change. The size is also in our toolbox and all that. You can see all your gear processing tools that all the way over here to the left side, and you could add a python window. Of course, if you have all these panels and tool bars viewable, but once you don't have much room that to look at your map. But regard that you should be at least somewhat familiar with how to do this in Archie Areas and the Q G I s, it's not much different. By default, you have a browser panel above the layers panel Layers panel is the same thing as a table of contents, but you see what there's air available and how they're symbolized. The browser panel is very similar to our catalogue. In fact, there's an entirely separate standalone program called Que Gi's browser that's used for the same purpose as a standalone version of our catalogue. This browser panel just provides a reduced, said a functionality for organizing your data. You see, Cugini s also has a bunch of tool bars. And just like with our G I s, you can move these around. You can move them over to the side cetera. You can also move them right into the middle and leave it undocked, just like in our G I s. If you want to see what two bars you have available there under the view menu and down at the bottom tool bars and a bunch of them, you can turn them on and off just by checking uncheck ing Them is also a panels menu bar and so you can see the different panels that are available. And since the statistics panel and this Gazit stuck it up here in top, But just like in q t s, you could move these around anywhere you want and just like the truth bores, you can leave it undocked out here in the middle. Some place so again, very similar functionality to R. J s. If you're familiar with how to use tool bars and RTs shouldn't have any trouble using them in Q g, i s either the panel's air a little bit different. There's a lot more of them available and they're not actually called panels and our g i s. But it's the same basic thing. Fact. We even have a python console that we get open in Q g. I s networks, just like a panel to just like in our curious. So again, take some time to play around, do some exploring and figure some things out on your own. And in the next lecture would talk about plug ins and we'll see you then. 7. QGIS Plugins: Welcome back, students in this lecture. I want to talk about some of the plug ins that are available in qg eyes and how you find them and install them. And this is something that I think is unique to Q G. I s in RTs. People can create adding and they can distribute them. And they used to be a place on the every website where you could such for Adan's that other people had created. Maybe you could find one that would add some functionality that you're looking for so you don't have to reinvent the wheel. I don't think there's any place in the RGs software where you can just search for third party Adan's and install them under your computer. You have to know what's available and get someone to give it to. You are. Somehow you have to get a hold of the adding file, and then you can install it and Q G. I. S, however, could see right up here in the menu bar. There's a menu option cut plug ins, and if you click, manage and install plug ins, you'll get a window that looks something like this because you G I s has a repository has access directly by the software. If someone writes a plug in and added to that repository, it'll be available to you. And you can just search through different plug ins that are available and add it to your installation of Q T. I s. So over here on the left, you can choose between all plug ins. You can look at just the ones that are installed. You can look at just the ones that are not installed. You might also see some of these that are in green. If you click on those will say, this plug in is trusted at the top. And no, tell you how many people have downloaded it, how many people have raided it and what the average rating is. So you get a little bit of an idea of how popular each Blufgan is and how good people think they are. I don't know exactly what it means to be trusted, something that you can look up on your own. Maybe let the rest of us know what you find out. But assumption would be that if you see this, you can know that this is not just some random thing that some random person put out there that this is something that has been used for a while and stood the test of time. Now, as I'm writing this Q d, I s 3.0 has not been released yet. I'm using one of the weekly build huge as 2.99 should have the same mostly the same interface and everything. But one thing that happened when Joe s moved from 2.18 to 3.0 that they started supporting plug ins in Python 3.0 instead of Python two point. Oh, What that means is the people that have written plugging they're gonna have to upgrade their plug ins to python three point. Oh, and, sir, right now, there's not a lot of plug ins that are available is only about 30 or 40 years. So I'm gonna go back a step and open my own version of Cugini s 2.18 again. This is one of the beautiful things about you, d i A. Since you can have as many versions as you want installed on the same computer. So hopefully by the time this course is released, there will be a lot more plug ins available. Right now. We're gonna just take a step back and take a look at Q T as 2.18 Can we have plug ins managing install plug ins? And here you see, there are literally hundreds gets. Whole panel is filled up and doesn't even get into the bees. So there are literally hundreds, maybe even 1000 or so plug ins that are available to you, and you might find some like this. Rt. I asked Arrest ap I connector. It'll say at the top of this plug in his experimental that might give you a heads up, that there's still some work to be done, and they're not guaranteeing anything. Also, see, it's only radio a little bit higher than three. That gives you a bit of an idea that not that many people are using it and hasn't been wholly successful, probably because it's still experimental. You might find some other ones like, for instance, one that I know is really popular is one called open layers that believe Yeah, the open there's plug in. If you take a look at that, it says it's trusted. They've been 1.5 1,000,000 people have downloaded it. 1000 people have raised an iterated very highly, provide some information and should ease your mind a bit about downloading this plugging. One of the reasons this is very popular is that it allows you to load background maps from open street maps and Google and several other places as well. No, the very popular one is cute yester web. So let you take a map that you've authored in q G I s and package it up, along with all the data that's in it into a leaflet. Web map or open layers were map that you can upload to your server. Little respect, especially that can the symbology. And if you limit, for instance, what scale certain layers are viewed at and things like that. But this would also tells you that there's a new version available Even though I've already got installed, I might wanna installed again just by clicking upgrade plug in. Now, if you have a plug in that you don't want anymore, you can just uninstall it by clicking install plug in. If you're looking at a plug in that you don't have installed All you have to do to install a is just quick this so it's very simple. And what exactly? There's a plug a look like when it's installed? Well, it depends sometimes will be an entire menu item. At the top level of menu toolbar like this one is the semi automatic classification plug in S. C. P. And this one has a whole bunch of menu items. It also has this toolbar. In fact, this toolbar and this one both are part of this plug in, and you can even if you look at them paddles, there's an SCP doc. So this SCP dock panel, it is also part of the game. So this is very large. Bucket has a lot of features, and it allows you to do a lot of multi spectral image analysis, that kind of stuff you would do with remote sensing software like Curtis or envy. I'm not going to tell you it is good hazard after envy, but you can do without of the same stuff. Rating. Q G. I s Now some other plug ins might be just in a lower level menu. So under this Web menu, open layers Plug in, talk a little bit about. That's just a menu item. Cute, yes, to read, but also talk a little bit about, and it's also a menu item. There's a queue tiles, punkin, but I have installed, and this will take your map and create a sort of map tiles that can be used in a Web page. And all this one is is a button on the toolbar. Same thing for a Q special light. And this cute Jaster Web is also a button. But it's also found under this Web menu. Cute, you're Mr Webb, so sometimes it can be multiple ways to access a pocket as well. And that's about if a plug INS will be using several different plug ins throughout this course. I'll be sure to let you know when we're using a plug game, and we're using some of the core Q G I s functionality, butt plug ins or a really powerful feature in q t. I s. They can really add a lot of functionality that really lets the developers of Cugini s really focused on making the core part of Q G. I s very robust, unstable, making that other people at all the bells and whistles and the next lecture. You look at how coordinate reference systems are handled in Q G I s and we'll see you then . 8. Coordinate Reference Systems: Welcome back in this lecture, we're gonna talk about Cordant reference systems and how they handled in Q G. I s to begin with. We look at how the handling in archaea? Yes. This comes up a number of times they might come up to display for your map data frame. You have to have a specific coordinate reference system, and then each layer can also have their own courted reference systems. And sometimes you might wanna project data from one coordinate reference system to another . In any of these cases, you're gonna have to choose accorded reference system that you want to use in both our G I s and Q G. I s after standard dialogue boxes for selecting coordinate reference systems, but they're organized a little bit different. Me? Let's look at their couldn't reference system for a data frame in our G. I s look at the properties of the data frame and then coordinate system and you'll see in our G I s coordinate. Reference systems are organized in folders. The primary distinction is between geographic coordinates systems and protected coordinate systems. Don't assume that you know what these terms mean. Have you been working with joyous for a while, so I'm not going to spend a whole lot of time talking about them. But geographic coordinates system basically refers to latitude and longitude. The units that define a particular point on the Earth's surface, expressing angles from the center of the earth protected coordinate systems. On the other hand, a measure the distance from a standard east ing or in standard northern line. So those units actually distances in feet or meters or something like that. And as a result, because the earth is round and any kind of surface everyone to create a map on is gonna be flat is projected coordinate systems only valid for a small section of the Earth's surface . Once you start moving away from the standard eating instead of northern lines, you start getting distortion in the map. It won't quite fit on the flat piece of paper, and usually they worked pretty good for a small area. But the further you get away, the more distortion you're going to get, so there's only good for a small section of the earth. So inside geographic corner systems, the second level in our G. I s looking at a specific area on the earth or there, some network for the entire world. But basically the only thing that you're choosing is the datum and the datum is a mathematical model of the Earth's surface, and before human started going up into space and could get really good measurements of the Earth's surface. Most of these day Tums also only valid for a small portion of the earth. And so usually these datum zehr centered in a specific area. It, since in North America were used a lot in at 1927 or 1983 the two most common ones that we use in the United States. So you really need for geographic corden system is to know the datum projected coordinate systems, however, are a little bit more complicated. Anarchy. I s a divided up into categories like the National Grid's State Plane, which is coming the use in the United States, especially by local governments. Each date or at least a bigger states, are divided up into several different grades, ease with each with their own standard northern and east ing. Another very common one is you tm and so under UDN. Then they start looking at geographic areas and also some specific date ums and then within those air categorized northern and Southern Hemisphere and then by the zone. The UDM system divides the earth up into 60 different zones. Each zone is six degrees of longitude, so 60 zones of six degrees each of 360 degrees, which is the circle of around the earth. You can also search for a specific coordinate reference system. For instance, you could type being Zone 11 and hit the search button, and then you'll be restricted to only coordinate reference systems that contain the Texas only 11. And if you expand one of these day Tums under U. T M, for instance, you see there's only one under not 83 the W GS. That's probably gonna be to one in the Northern Hemisphere that zone 11 in and one in the Southern Hemisphere, that zone 11 s who have you wanted to search for. For instance, in Albert's projection, you can type in Albers and then search. You see, there's a few under national grids in Australia and under state systems as well in the U. S. Mostly you know, a little bit about the coordinate reference system that you're looking. You can find what you need. You don't have to search through his entire directory structure. You can also have the son that you use a lot. You can cook, add to favorites and then under the Favorites folder, anything that you click add to favorites. We'll show up there. So this you often times in your area that you're used to working in. That might be two or three or half a dozen different cordant reference systems that you're used to working in that to use a lot. And so you might put those into your favorites folder just to make it easier to find. Now, in Q g I s do something similar for go to project Properties under the CRS tab, find something similar and that the first division that they're organizing is in geographic coordinates systems and protected coordinate systems. Just like it. Our G I s under geographic cordant systems. All you need is the data, and you'll find some interesting ones in here. For instance, 500 different planets, puto, 2000 Uranus and Venus. So if you work for NASA and you making maps of planets, you can find a coordinate reference system specific to other planets as well as other places on the Earth. Find that most of these that refer to another place on the earth or having older Date 1934 67 55 72 etcetera. And that's because once we started going up into space, we really got some good measurements of the Earth, and we have some good data that will fit the entire Earth so we don't have to have so many specific for different places on the Earth's surface under projected Cordant systems. The next division is the projection we have. Albers equal area has made equal distance Cassini and mature with that one is equidistant iconic. So there's a bunch of different projections in here, and one of those protections is universal transverse Mercator or you tm and then within you tm they're organized by datum, so I'm not sure what a g e d is. But I used to work in the U. S. Your find some of the standard ones that we use like now 27 not 83 then after production. They're organized by zone. So the organization is a little bit different than our G I s. And I want to include this electric so you won't be so confused when you start working with Q T. I s And you need to select according reference system. We can also just like our G i s You can search. So, for instance, if you just want to search if you're working in Colorado and we're gonna work with Colorado State playing, but you're not sure what the name is, you can just type in Colorado and stay playing. Happens to be in the Lampert conform laconic production. But then you can choose color out of north color out of south, coming out of central etcetera. And if you work with these, a lot of Knoxville. Yeah, she'll recognize some of the terminology. No. In Q g s, you don't have to select favorites is automatically going to be a box up here that includes recently used cordant reference systems and that will include the ones that gene most commonly used in Europe work for. You don't have to go and specifically selected. Favorite wanted to use a lot was if you use most recently always gonna show up in here and so you don't have to search through the entire set of coordinate reference systems. Now, I want to show you something else in this directory that I've included for you guys and includes the data and the different map files to see in the shape file If you used to working in our G. I s used to seeing a shape file one of the files as a P. R J extension and that just includes information about the projection for that data. Now, if you were to look in that queue Js for our G I s director me that included for download with his course look at the shape files that are included You see that each shape file as one file that as a P R J extension if he used to working in RTs you've seen those, you probably know what it is. It's the projection file that tells RTs exactly what projection the data is in. And if you take a look at that, all it is is some information that includes things about their coordinate system, the datum sphere or the primary diem units, etcetera. But now that we've loaded the same say file in the q G. I s. We get another file in here that has a cute GJ extension, and it's a different file that Q g I s uses to define the projection, and we can open that as well. And it includes pretty much the same information information about the coordinate system, the datum spheroid primer video, the units etcetera. Then it also has some other things about an authority. Several different organizations that defined standard projection systems around the world. E psd is the most common one in each one of those standard coordinate systems. There are several 1000 of them any BSG has a number associated with. And that's what these values represent, because Q g. I s is really standards based. It relies on standards that have been developed by other organizations for these Cordant reference systems, as we, on the other hand, as their own proprietary system for defining cordant reference systems. So that gotta doing their own thing and doing what everybody else is doing, and that makes it projection file a little bit easier to understand. But it also makes it less flexible because they don't correspond to standards that are set by other people. All right, that did for Gordon Reference Systems. Hopefully, it's not confusing. The whole topic is a source of confusion for a lot of people, but it is an important topic that you always have to keep in mind when you're working with geographic data. So thanks for listening in the next lecture will talk a little bit more detail about some of the panning and zooming tools, and we'll see you then. 9. Measuring and identifying: Welcome back, students. This lesson is gonna be about measuring and identifying features. That's important because after where is it? The first question that most people have when they look at a map is how big it is and what exactly is it? So they answer the question of how big it is in archeo. Yes, we have a handy measure tool When we click it, we get this measure dialog box and has a couple options little down triangle that you choose the units that you want for most distance and area. So I've been both sent two miles right now, and you can choose whether you want to measure a linear distance or a line. So right now it's set to linear distance and I can go around and click each time I click. It gives me both the segment distance, which is the distance from the last click and the total bank that everything I've quick and if I double click, then my little drawing goes away and I just had the total and even when their totals exposed you, I could change the unit. Say I want to change from miles to kilometres. So say we want to have an idea of how long this pipeline right here is. All I have to do is start in one end, make a few clicks and there we go 1.5 kilometers and that's just under one money. If we change it back to Miles you 2.93 miles. So it was pretty simple area. We can do the same thing. Say, we wanted to measure the area of this burning al habitat right here. We can just start cooking around it, aim and we're done. We double click and it gives us both the segment length again from the last place I clicked , the total perimeter and the total area that's enclosed. So that's pretty straightforward, right? He also have options, not even sure what all of these are. But depending on the coordinate system, that the map is een may have the option to use geodesic, which would take into account the curvature of the earth. Now, this scale of such a small area, the temperature of the earth isn't gonna have much of an effect. But if you're looking at the area of an entire state, you'd probably get different number, depending on whether you're looking at a plan, our measurements, which planners perfectly flat or the geodesic. And be honest with you, I'm not 100% sure look syndrome is well worth great. Elliptic is Q G. I s. We have a simple thing. We also have a measure. Tool even looks really similar. It's got a ruler when we click that we also get a dialogue box and we could do the same thing to get a measure of that pipeline. You can just do this this time when we're done, instead of double clicking, we want to right click. And so we're getting something very similar and meters 1500 something meters. We can change this two kilometers or change it to miles and notice, though, that in this box up here will give you a list of each segment that you clicked on. So it's not just the most recent one. You can see the bank of all of the segments. Now we want to measure areas. It's drop down box beside the measure line tool let you pick a measure area tool, and when that's active, we have a different icon in the toolbar, and this works in the same kind of way we can just drawing area when you're done, you're right. Click and no tell you how many meters you're looking at and you get the same thing in square kilometers or heck cares, or any kind of area measurement that you want so that help us answer the question of how big it is Now the next question you might want to ask is, What is it? So in Arcadia, Yes, we have this identified tool. And if we click that, the cursor will change when we're on the map canvas to have a little eye on it. And if we click on something, it'll tell us what feature we're looking at. So this is pipeline number 2 96 Have you right away with the 50 Zone as any kind of attribute information that you have in here? We'll talk about attributes a little bit more further along in the course. Now, sometimes, like maybe right up in here that a lot of stuff in there and it's hard to know exactly what you're clicking on. So in this case, we could have British will be cooking on three different things a pipeline, another pipeline or an access road. So this is just take a look at the attributes of all three of these features that we've potentially clicked on and you can find tune some things to get specifically what you're looking at. For instance, if I click on here, I'm trying to click on this rapid nest, but it keeps Give me a pipeline. It's because at the top, most layer selected and then here projects, if you look in the table of contents, is the top most layer. But I want to make sure that I'm getting a wrap. The national I can select wrap the nest specifically. And then, if I click on that, I'll get a wrapped in Ashton. Nothing else. You could also choose all layers. And then if I click here, I'll see I have a choice either the linear project or their optimist, one of the other who have a lot of options to find, doing exactly what we're looking at. Que de I asked. We have a similar functionality. We haven't identified features button that does a similar thing. If I cook on this pipeline, I can see the attributes. I'm gonna scoot this over a bit and I confined tune some things either the current layer, in which case I would choose a current layer by highlighting. So in this case, if I click here, I'm going to get the linear project. If I have the current layers that Director nest and I click here, I'll get information about their after NIST and I could also, for instance, so that top down And then if I click here just like if I had all layers selected in our G I s, I have a choice between the linear projects or thereafter NIST because they both could have been under the area where I clicked. So again, very similar functionality, A little bit different terminology, Like always. I'd encourage you to open up those projects and I included with this lecture and play around with the data yourself And again, as always, please let me know if you have any questions. The next lecture. We're gonna talk about panning and zooming in creating spatial bookmarks and we'll see you then 10. Panning, zooming, and bookmarks: Welcome back, students. This lecture is gonna be about panning and zooming in saving bookmarks so you can return through a specific place in the map. And if you've worked at all with the eye as it should be second nature to you. So I'm not going to spend a whole lot of time. But in our G I s, we have both zoom in and zoom out buttons and zoom in button. You can either quick at a certain spot on the screen and it'll zoom into that area. You can also, if you want, hold the shift key down and draw a box and no zoom into that area. Now we have this left facing errors is go back to the previous extent. So let let you go back. And then once we go back, then we can go forward again to the next extent so we could go back and forth between two different spatial extents. And of course, we have the pan button that you drag the map around this world but zooms out to the full extent so that'll zoom out to the full extent of all this data is in the man and we have some buttons here that's just a fixed zoom in or fixing them out. So we could just cook that button to zoom in a certain amount, were cooked the fix room out, and that will also zoom out a certain amount. So that will do. Basically the same thing is activating the zoom out tool and then cooking on the map in the Cugini s. We have almost the exact same set of tools. If that the hand that you dragged the map data back and forth we have zoom in and zoom out tools Zoom in again Let us click on a certain spot and zoom into it We're just like anarchy IIs to get hold the shift key down and draw box to zoom into the box We also have this little left pointing error The zooms to the last extent and right facing I rode that will return back so you can go back and forth between different spatial extents. Zoom to full, does the same thing as the little world. But you know J s zooms to the full extent of all this data and we don't have a fixed zoom in and fix him out like we do in our G i s. But again, we get that same functionality with these humane and zoom out tools. And we do have some possibilities for a painting the map to our selection or zooming to our selection who zooming through a specific layer. But I have heron rookeries highlighted click zoom delayer gonna take me to the extent of heron rookeries. And there aren't buttons in the default toolbar to do things like that in our giants. But you can do the same thing through Withdrew bar, so it's pretty much the same thing. For instance, in our G i s. If I, right click on the layer, have resumed a layer button now are not GS weaken do spatial bookmarks a table through the bookmark menu. And when we click that we have two options create bookmark creates a bookmark, which is this exact spatial extent that we have in a map cameras right now. So I'll name that GBH extent if I zoom in and I'm just zooming in using the scroll wheel in my mouth. That's another way to zoom in and out. And I use my information tool. I can see that this particular excess road has a number of 5 21 So I'm gonna zooming a little bit closer just to that access road, and then I'm gonna create another bookmark. Call it rude 5 21 and I don't know what this thing is, but I'll find out with my identified button. That's an extraction number 3 54 So I'll zoom in there, creating another bookmark, and I'll call that extraction 3 54 It's another Have these bookmarks. I can move from one to the other despite clicking here. So there's the extent of the great blue heron layer. There's Maroon 5 21 and there's my extraction 3 54 because they have a manage bookmarks button and this give you the ability just a zoomed to a pan to one of these bookmarks. We move one, all of them. We can change the order that they re appear in, and you can even say these bookmarks to a text file and send it to somebody else, and then they can load that into their own map. Now, Q G. I s doesn't have a bookmark menu item, but it does have some tools on the toolbar that allow us to do similar things. And also, under the view menu, you can create a new bookmark and show bookmarks is basically the same thing is managed bookmarked in our G I s so I'm gonna click new bookmark. Now, look, I've mentioned Cugini s 3.0 has not actually been released at this point. I'm working with a pre release version and the bookmarks C McCain not actually working in this previous these version. I'm sure they'll be working when three point hours released by the time this course is released. But I gotta go back and show you in Q. J s version 2.18 How these bookmarks work because from what I can tell, it's gonna work exactly the same way in version three point. Oh, so if I zoom to the extent of heaven rookeries by selecting it and then clicking the zoom to layer button, I can create a new bookmark is in the new bookmark tool. And when I do that have his panel it opens called Spatial bookmark panel and I'll have to do is change the name to GBH. Extent, man, I'm going to zoom in its using my scroll wheel again. I use my identify button to find out what this is. Looks like it's a pipeline Project 31. I'm going to zoom right to that pipeline, and then I'll create a new bookmark. Call it Pipeline 31 then I'll take a look at this burning out habitat. It's like the Habitat ideas 1 70 So I'm gonna zoom into it to create another new bookmark and call it Buel 1 70 So the same kind of thing that we were doing in Octavia, yes. But here it can move from one to the other by double clicking on it in the spatial bookmarks panel. Or you can also highlight it and click the zoom to bookmark button your way. We're doing the same kind of thing. And just like in the bookmark manager, we can delete one if you want. I'll delete this pipeline 31 just by hitting the garbage can symbol and this little button here that says important export bookmarks again, just like we couldn't actually, so I could export these to bookmarks europhile emailing to somebody. They could import it into their project, and they could go to the exact place that we wanted to show them on the map. So again, very similar functionality. A little bit different terminology, a little bit different methods for doing things, but very similar. So again, thanks for listening. The next lecture, we'll talk a little bit more about map documents. And what happens when you save a project in Q G. I s and we'll see you then. 11. What happens when you save a project?: Welcome back, students in this lecture, I'm gonna try to into the question what happens when you save a project file in Huge es Now , if he used to Our G i s you know that you can save a map document that's a file as an MX de extension, and it doesn't contain the data that we're looking at. It contains links to where that data is found and that might be in a file or it might be a Web service are it might be a table in a special database somewhere, but doesn't actually contain the data. What it does contain, it is information about how that data is symbolized. So all the colors and point markers, etcetera contains information about the state of the program. So the spatial extent of the map canvas. And also, since if you change her environment at all, maybe you have our catalogue window open. Those kinds of things will get saving the MX defile if we look at the map document properties that submitted data that you can add in here Title summary description, authors, etcetera. One thing that's important is this path names. You have to decide whether you want to store a path May And that's the link to this data either in absolute terms. So starting from the C drive on your computer, etcetera relative to where the mixed e file is stored and relative is nice. If you have all your data in the MX, defile stored and say one directory and then package up that directory and sent it to somebody. But you could move that directory around in the directory system on your computer. And as long as the MX d and the data files stay in the same position relative to one another, everything's gonna work. Fine. You won't get broken links, But if you move, just TMX defile someplace, then those things will be broken. None. The default is for this not to be checked, and then it stores absolute path names. And that would look something like this study from your C drive all the way through. And in that way you can move the MX defile anywhere you want within your directory structure, and we're still linked to the data. But if you move the data than the links going to be broken, so it was an important consideration Now I had this checked because I wanted to include in this course one directory that had both the data and the MX defile. And hopefully you've all download that and you can open that and load the map document and see all the data because all the data is in the same place relative to the map document. Now something. It's different between our G i S and Q G. I s is anarchy, I asked. You can have multiple data frame. So right now we only have one that's called layers, but we could have a second date of frame. There would have different layers, etcetera. That concept of the data frame doesn't exist in two Gs. There's only one data fame for map document. But if you look at the properties for the data frame, I just right clicked on that I went down to properties. There's a whole lot of options in here. You can change the way the coordinates are displayed. You can set some options related to the map. Extent you can choose according reference system that the map canvases displayed in you set up a grid that would show, like maybe every 1000 meters of UDM measurement over using a geographical coordinate reference system would show everywhere there's a line of latitude and longitude. Contains actual size of the data frame, can change the background color or put a border around it. So, for instance, I wanted to put a light blue background color on the map. I could do that. Yeah, there are a lot of options related to the data frame and all those options. Also, we're going to get stored in the map document, but be information about each data frame that's included in the map document and the options that you have set for it. Q. G I s is very similar is not called a map document. It's called a project, and the extension is Q G s rather than MX D. Like I said, there isn't the concept of having multiple data frames in q g. I s in the one day to frame per project. There's multiple data. Fame's mostly come into play. When you're creating a map, it's going to be printed, and you get multiple views of the same data. Have a locator map or something like that on the map. Let's handle a little bit differently in q G. I said You'll see when we get to that part of the course. So we don't have data fame properties, but we do have project properties that we can look at right here here. We also have some metadata, really only the project title. But you can change the background color like we did in RTs. We have a choice of having absolute or relative paths. That's really the only option that you have in the map document properties in Arctic areas . Everything else is under the data frame properties, but you can choose other co ordinator displayed in Q G i s You can choose which coordinate reference system. The data is displayed in you can choose which layers are available to be identified with the identified button. One thing that Cugini s has that RKS does not have radio has some markers this and building python functions. And if your python programmer you probably recognize ease because building python functions that will respond to map prevents. So just when the product is opened, when the project is saved when the projections closed. So if you want a raise in python actor that does some specific things may be set up some environmental variables or style, some layers or things like that. You can do that right in the Project Properties panel. Another thing that Quds has that are chest does not have. This is concept of variables. So there is some default variables. Already in Q G. I s some global variables that have to do with the version of Q G I s set of using in your user name. It's in variables that are associated with the project, such as a coordinate reference system, the name of the file, the title project path, etcetera, and then each layer. You can also have some variables, and you can actually create your own, in fact, so if you want to create some variables in here that then you could manipulate in some python code, you can go and do that. And that's pretty cool. So in Q g. I s all these settings in variables and even some of that python code it center is stored in the project filed as a Q. G s extension, and that's gonna be it for this lecture, and that's probably gonna be in for this section. I may end up adding some additional lectures later. Out in this section, we'll see. But right now it's the last lecture in the section. In the next section, we're gonna look at the different types of data that are available to be viewed in Q G I s and how you can access that data and we'll see you then.