Hello Charlie,
Hurrah! Does this also mean that, with suitable definition of the polygon used for land, we can finally banish the "Garmin yellow" background to history?
Yes (and no). You can give the "land" polygon whatever colour you desire. However, at the moment, the patch doesn't generate "land" polygons for tiles that contain no sea so you will end up with different colour land depending if the tile contains sea or not. Mapsource and some GPS units honour the colour in the 0x4b (Map background) polygon but not all do (like the Nuvi). I am just making a v3 patch that will generate a "land" polygon for tiles that have no sea as long as --generate-sea=no-mp has been specified. I realise that it is perverse that the land colour is influenced by --generate-sea. Cheers, Mark