Self-made. I generated the base map using code I wrote to process the GTOPO30 data. The coastline was taken from the GSSHS coastline data bundled with GMT. The list of mountain peaks was ultimately derived from a list created by Jonathan de Ferranti from SRTM data, and which is not copyright. The degree-minute-second co-ordinates were converted into the Winkel-Tripel projection used in this map using code I wrote myself.
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