Raster layers are now implemented in the new 1.19 map renderer. They use the same raster data as the current version, but adapted to the new coordinate system, which required a lot more work than anticipated.
All the work cleaning up coordinate handling paid off in the end, with some major new features enabled by it. For example in 1.19 it will be possible to rotate the map.
The map system is now capable of supporting any number of map data sources, both raster and vector. Players can create new map sources, reorder them and apply basic color filters from the UI, even to sub-layers for vector maps.
And finally an HTTP map source adaptor was implemented. This data source allows to use HTTP tile servers using the same standards used in web maps. You can for example find a source of satellite tiles and use it in the game.
Check the devblog for all the details: