Geoprocessing - Desktop GIS: Mapping the Planet with Open Source Tools - page 148

Figure 10.2: Raising sea level by 100 meters

Using r.lake is a simple example of a pretty powerful tool in the GRASS
hydrologic modeling toolbox. If you use your imagination, you could
combine this tool with a bit of shell script to loop through multiple iter-
ations of rising sea level, saving each image using r.out.mpeg to create
an animation. But we'll leave that exercise to you.

10.4 Creating Hillshades

You've no doubt seen those fancy shaded relief maps. Now we are going
to see how to create one from a DEM using the GRASS r.shaded.relief
module. Again we'll use the Ancc6_dem DEM as the starting point. First
let's get a look at the usage and options for r.shaded.relief .