Land is brown and sea is blue.
The supply center dots are colored to reflect each one's current owner. That is, if England owns a center, it will be shown as dark blue. Enter Thomas Kuhlmann, who begged me for the code, and then helped me make it backward compatible to existing map files. Much later, as part of the development of the DPjudge , I completely rewrote mapit in a mere 270 lines of Python as an integrated module for the dpjudge. This module, called dpmap , also serves as a standalone executable and is available for download here as well.