This is a guide to show how to use GIS to add data to a web map and to use base maps to enhance the visualisation. To do this, we're going to use ArcGIS Online and we've signed in here for that. You know, if you've signed in if you've got a background that's either a purpley colour or green colour, it will have your school name and it will also have your name in the top right-hand corner. You'll see a series of menus across the top, home, gallery, map, scene, groups, content and organisation. The ones you're most likely to use will be map and content and seen. The focus for this demonstration is going to be how to use map. So if we click map, it opens an app called Map Viewer and that shows us a web map, which is an online GIS digital map. Now, if we look at each side of Map Viewer, we can see two sets of menus. On the left we have what's called the dark toolbar and that's for contents. On the right-hand side, we have the lighter toolbar, which is for various settings, and we'll see how to use those shortly. It's generally best to use these in collapsed mode, but we can expand them to see them a little bit more clearly. You can do that on the settings toolbar as well. And the icons all have popups to tell you what they're for, but if you use them expanded, you can see those a little bit more clearly. There's also an option where you can hide the toolbars by clicking hide interface and you can make them visible again by clicking show interface. Okay, we're going to add some data now to our web map and the best way to do that is to click add in the top left-hand corner and browse layers. We're going to add some secondary data that's been collected by somebody else. So we click browse layers and you'll see a range of places where you can get that information from, including my content, my favourites, my groups, my organisation, Living Atlas and ArcGIS Online. So secondary data, best places to get that would be Living Atlas or ArcGIS Online. So we're going to click ArcGIS Online and look for a layer called, "Volcanoes around the World". And if we look down, we can see a layer with that name here. We're going to add that to the map by clicking add. So that layer's been added effectively and you'll notice a properties panel for it has opened on the right automatically. Properties panel can be very useful. One small way is to use the transparency slider so you can make the layer less transparent or completely transparent. So let's just see that back again, it's 0% transparent, so we can see the layer now. And I'm going to add another layer. This time, we're going to search for tectonic plates and various layers appear for us to choose from. I'm gonna suggest you choose the one by Esri Canada Education. So if we click that and add it to the map, it will appear on the map and it will help us to make links with the original layer of volcanoes. Now, we've done some good work here. We've added a couple of layers. We want to save our work, so we click save and open and then save as for the first save, and we have to give the map a title. So we're gonna call it volcanoes. I'm just gonna add demo to this. You don't need to do that. And then we click save and the map will save with that title, and you'll see the title appear in the top left-hand corner. You can change that with the pen at any time. By default, our web map has a base map, that's the background map that provides a foundation for all the data. So if we just hide properties for the moment so we can investigate base maps, go to the dark content toolbar and click base map and we'll see a base map gallery. And we can make a selection of different base maps to see which ones are best for visualising our data. Let's take a look at some of the options in the base map gallery. We can scroll down through them here. One of them, for example, is called chartered territory, and that's a map which emphasises human geography. Another one might be National Geographic style map. Another example we could look at would be imagery or imagery hybrid. Imagery and hybrid are very similar, imagery hybrid has labels on everything. And then we can try, let's see, there's light grey canvas or dark grey canvas and each of them work in different ways. You may have a preference, but one of the things you might like to consider here is that the dark grey canvas map doesn't provide very good contrast with this data, whereas light grey canvas is much more effective. You can see the data much more easily. So these are the considerations we need to make when we're choosing a suitable base map.