QGIS 2 Lesson 13 Creating binary rasters and converting raster data to polygons
It can be useful to create binary rasters or yes, no rasters. Is an area higher than 1500m? Yes - colour this area white, No - color this area black. This doesn't have to just be used for elevation and could just as easily be used for precipitation values, forestry values etc. We will first create a binary raster and then turn this into vector data that we can use more easily for certain tasks.