In this video we're going to use ArcGIS Geography Visualizer, which is a geographic information system to investigate the location and size of China. Now, in the geography visualizer, there are different base maps, so different sorts of maps that we can use. Now, in order to change this, because for this exercise it will be useful to change this. We go to the toolbar at the bottom where it says base maps, and we click on this. And here I'm going to click on the charted territory map. You'll see at the moment it's what we call an imagery hybrid map, which has the country borders on, but also it's satellite imagery. So you can see something about the physical geography. But here it's gonna be a bit easier for us if we use the chartered territory map 'cause really this is about looking at the location relative to other countries and the size. So we don't need the satellite imagery to do that. It's a bit easier if we can see the borders more clearly. So what I'm going to do is I'm going to first of all have a look at China in a bit more detail. So I'm gonna bring it into the centre of the screen by holding down the left mouse button and putting it in the middle. And I'm going to zoom in. I can use this zoom in button, open the top left, or I can use the scroll wheel of the mouse. And that's going to take us in a little bit closer. Now you'll see on this map, it's really useful for giving us different geographical references to help us describe where China is. You can see that we've got the equator here. So we can see that China's north of the equator. So it's in the Northern Hemisphere. We can see the Tropic of Cancer runs through the south of China. And we can also see the countries that it borders. Now I'm gonna zoom in slightly 'cause we'll be able to see these in in a bit more detail. We'll give them, give the names if we do that, and you can see here, you can go round and look at the different countries it borders. So Vietnam, Laos, Myanmar. If we zoom in, it will tell us the other countries here. So we've got India, which stretches through to there. We've got Bhutan, we've got Nepal, we've got Pakistan, we've got Tajikistan, Kyrgyzstan Kazakhstan, Mongolia, we've got North Korea, we've got Russia. So the first thing you'll see is China's got a lot of borders and because it's such a big country, it's got enormous amount of borders. So that tells us something about where is its location. But we also want to know something about the size. So if we zoom out, you might think that actually by zooming out, we can just have a good visual reference about the size of China just by looking at it. And you can then look at it and compare it maybe with the United Kingdom and Greenland and Russia. However, there is a problem with that. And that's to do with map projections. The problem is when we take something spherical like a globe, like the world, and then try and put it onto a flat surface, like a map like this, it distorts the map in different ways and we can choose the different projections that we want to use, but all of them distort the map in slightly different ways. So it might enlarge countries towards the north and south of the globe, it might not quite give the right shape if we use a different projection. Now here we're using something really based on the cater projection. So we might think we can just compare countries, but actually there are some problems with this. However, there is some handy tool that can help us out. So we have in the bottom toolbar got a measure button. So we click on measure and then click on this ruler. It changes the arrow. So we can now see this cross and it allows us to measure distances. And what I'm going to do is I'm going to measure Greenland and pair that with China. You can see from this map that Greenland looked much, much, much bigger north south than China is. So I'm going to see that that is the case. So I'm going to click on the north of Greenland and I'm going to go all the way down to the south and I'm going to double click and that will keep it there. Now, at the moment it's in miles. We're going to change this to kilometres by going into the popup and changing it to metric. And you can see there it's just over 2,600 kilometres. So 2,616. Okay, if we go to China now and do the same, if I measure again, if I do a new measurement, it will take the old one off. So just be aware of that. Now, slight issue with China, it's a bit more difficult to know exactly where to measure from. I could go north to south here, I could go from here. So I'm gonna go from I suppose the largest extent from north south. So I'm going to click on north at the top here, and I'm going to go to the south. So it's kind of in line with this bottom border. It doesn't have to be exact, but it gives you a good idea. So I'm going to double click on that and I'm going to change it to metric. And that is 3,578 kilometres. So that's nearly 1,000 kilometres longer north to south in Greenland. And you would never expect that when we look at this map. So the geography visualizer because of this measurement tool is a really useful way of being able to give a really accurate geographical reference for the size of different countries so that we don't have the wrong idea in our heads.