In this video, we're going to use the ArcGIS geography visualizer to visualise the flood risk of a town. The way we're going to do this is we need to add a layer to the map, and a layer in a GIS is essentially geographical data that we can put onto the map. So you'll see the bottom toolbar down here, and I'm going to go to where it says Open Map. Now, there are a series of other layers I can add if I click this plus button, but here the layer that we need is in this Open Map button. So I'm going to click on this and you'll see a whole range of different layers come up. And this one on the second row says flood risk in England and we're going to click on that. Now, I don't have flood risk for Scotland, Wales, or Northern Ireland because this is based on the environment agency's data, and that's the government agency that works in England. Now, this takes us through to Shrewsbury, sometimes pronounced Shrewsbury, but we're not going to investigate here. We're going to go to a different place. So to do that, I'm gonna go to the top left-hand corner of the screen and I'm going to click on the magnifying glass where it says Open Search, and I'm going to type in Keswick. And here we go. It says Keswick, Cumbria, England, GBR. So I'm going to click on that. It's going to take us there. Now, the first thing I would always advise, I mean, I can see it says Cumbria, Cumbria, England here. But for us to understand where that is in the UK, which is really important, the best thing to do is zoom out. Now, I can come to the top left-hand corner to click on this button, or I can just use a scroll wheel of the mouse, which is what I'm doing here. And I can zoom out, I can still see the circle, and it shows where that is within the UK. And we can see it's in the northwest of England. It's in this area of the Lake district here, Lake District National Parks, North of the Lake District. I'm going to come back into it now, so I'm gonna come back into Keswick. And you'll see on this map that we have a load of blue colours and some squares of different colours as well. And that is because they're the layers of data that we've now added to this map. Now for me to understand what they mean, I can click on Legend at the bottom toolbar, and it shows that these sort of different coloured squares are important buildings that we'll come to later. And the blue colours are the risk of flooding, the high, medium, low, very low. So we can see that Keswick has got a significant amount of blue on this map. Now, what I want to do is I want to visualise whereabouts in Keswick the flooding is at its worst. Now, to do that, I want to use some geographical language, some directional language. So that means I want to talk about whether it's worse in the north, the centre, the south, and like that. So I've got to think about how I will do that. So in order to do that, the first thing I'm going to do is I'm going to zoom out and I'm going to actually click on the map layers. I'm not going to click on this Remove button. I'm just going to unclick this box, which basically means we won't see the layers. I can click that box and it'll come back again. And all I'm doing is I want to show the extent of Keswick at the moment. Now, I could use different maps for this. So I'm gonna use an imagery map, and we can see the buildings very clearly on this map. Now, I don't need to be perfect here, but what I do want to do is just draw a line around Keswick or just around the extent of where Keswick lies on the ground. So I've clicked on the sketch button in the toolbar, and in the popup, I'm going to click on Line, which is on the tools. And I'm just going to draw it very rough and it is going to be rough. It's not going to be perfect. And I just click, keep left-clicking on this on my mouse button, and it draws a line around Keswick. It doesn't have to be perfect, but it gives us an idea of where Keswick is. The other thing I want to do is I want to make sure that I know where the centre of Keswick is. Now you might think, oh, that'll just be in the centre of this box, but I don't think that's really true. I'm thinking about the town centre where all the shops and services are. So if you know this area, you can zoom right in and think about where that centre is. Now, this is Keswick and I know that this is the sort of main street here. This is what we call the Moot Hall. So I'm going to click on where it says point in my popup, I'm going to choose a symbol and I'm going to click it close to Moot Hall. I know that that's the centre. And what that means now is I know as a visual reference where the centre of Keswick is. So if I zoom back out now, so I can see all of Keswick, I'm going to come back to the map layers at the bottom and I'm going to click on the important buildings and I will click on the risk of flooding. And now I've got a really good visual reference for where the flooding in Keswick is. So I know this is really the centre of the town just because I got a point here. So what I can see now, I can see that the centre of the town isn't really at risk of major flooding. The south and east seems to be not at a risk of flooding. The thing that really is potentially at risk of flooding is where this river, the River Greta, runs through the north of the town. I can see this risk of flooding around the river and certainly to the west of the town. I can see a risk of flooding as well. So that's a really good tool for visualising where is at risk of flooding within a town.