This directory contains world map bitmaps for use in Astrolog 7.20 or later. They can be loaded with the -XIW command switch or the "File / Open Bitmap / Open World Map" menu command. earth.bmp: The default earth.bmp that comes with Astrolog download (1024x512 pixels). earthbig.bmp: Larger version of earth.bmp with more detail (2048x1024 pixels). earthalt1.bmp: An alternate world map showing topographic features (2048x1024 pixels). earthalt2.bmp: An alternate world map showing country/region outlines (2048x1024 pixels). earthalt3.bmp: An alternate world map showing simple gray landmasses (2048x1024 pixels). Image source from NASA: https://visibleearth.nasa.gov/images/74218/december-blue-marble-next-generation Image source from Wikipedia Commons: https://commons.wikimedia.org/wiki/File:Equirectangular-projection-topographic-world.jpg Image source from Wikipedia Commons: https://commons.wikimedia.org/wiki/File:World_location_map_(equirectangular_180).svg Image source from Vemaps.com: https://vemaps.com/world/wrld-13