Overlay and Patch Maps

Look at:

• r.patch - Creates a composite raster map layer by using known category values from one (or more) map layer(s) to fill in areas of "no data" in another map layer

• i.image.mosaic (script, not module; no man page) - script to mosaic (aerial) images. A new image will be created with extended colormap.

• r.mapcalc - Raster map layer data calculator

• r.combine - Allows category values from several raster map layers to be combined

• v.patch - Creates a new binary vector map layer by combining other binary vector map layers

• v.cutter - Polygon Cookie Cutter