In order to create constraints, we need to convert our input features to raster maps. Before converting them, however, we need to open the correct layers, and apply filters on them to show only the suitable features:
- Open the landuse layer and the SRTM DEM.
- Apply a filter on the landuse layer to only show features which are restricted. It is simpler to create a filter which excludes land use types suitable for us, as we have fewer of them. Let's assume grass and farm types are suitable, as we can buy those lands. The only problem is that QGIS uses GDAL for converting between data types, which does not respect filtering done in QGIS. To overcome this problem, apply a filter on the layer with the expression "fclass" ...
