The beginnings of a new map for a Medieval 2 Total War mod. The map used as a template is from NASA, and was converted into the desired projection using G.Projector, also from NASA. Credit for the dimensions of the map are due to Total War Center's wiki, and the map was made in GIMP 2.6.8
The dark color of the water on the reference map made it hard sometimes to discern where land ended and water began. I did not trace this pixel by pixel, I only worked at that level a bit at a time. This map_heights needs actual heights, but this is a start. From start to finish it took me about a week to make to this level.
To improve this further I will use smaller maps with more detail to fix each area. That process will probably use Wikimedia. I will also use maps that seek to show the land as it was during the mod's timeframe. The Low Countries, Scandinavia, the Highlands of Scotland, the Aegean, and the Black, Caspian, and Aral Seas are all to be considered far from complete.
EDITOR'S NOTE: This is still a work in progress, though no effort has been made in months.