 Hello, this is Hans van der Klaas from IHE Delft Institute for Water Education. In this video I am going to show you how to use the Profile tool. In a previous video I have already demonstrated how to treat digital elevation models and make them ready for catchment delineation and hydrological studies. And that's the data that I am going to use to demonstrate this. So I have a DEM from SRTM, a raw one, and I have one that is filled. We need to do this filling for hydrological corrections. And with the Profile tool I can demonstrate how the filling made a difference in the elevation of this open pit mine of the Inden mine in Nordrhein-Westphalia in Germany. So let's first download the plugin. So we can find the plugin in the Plugins menu and we are going to look for the Profile tool. I already have it installed so I just checked the box, otherwise you install the plugin in this way. You need an internet connection for that. When you have installed the Profile tool you find this button, Terrain Profile. And I am first going to show you visually here on the screen the difference between the two DEMs, the filled and the non-filled one. So we are looking now at the original SRTM that is not filled and I blended it with a hill shade. And I prepared map themes, that is also demonstrated in another video. And I am going to look at the filled one. It is also a hill shade but you see that the filling algorithm, remember that we used for that Wang and Liu fill sinks algorithm, this one, that it fills pits in a catchment in order to have a better drainage for hydrological studies. Okay now I want to compare these two DEMs, so the non-filled with the filled one. And I can do that using the Profile tool. Here is the Profile tool and I am just going to add a layer here. So I am going to select the DEM non-filled and I add the layer and then I can draw a line here. And this will give the profile of this section. So if I double click it will fix the line. And I can now add another layer, the filled one, this one. And that one will now be added. I can change the colors so I can make for example the filled one green and now we can compare the filled with the non-filled one. I can export these profiles to PNG or to DXF or SVG to further treat it. And I can control if we want to see the cursor or not. So when you export it often you don't want to see the cursor here. But if we see the cursor we can see it interactively where we are here on the transect. You see that the screens are linked. You can also select an existing polyline or layer in order to get the cross-section. It also reports the values in a table that you can copy and use in other software. And there is a settings tab where you can do some more advanced settings.