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Disclaimer: I work at the British Geological Survey I made an internal enquiry on this issue, to see if we had any further information on the Kenya maps, and this answer is a summary of the information received. First off, it's important to note that these maps were hand drawn in the Kenya office and would have used the Kenya topography maps as their base. ...


Second try, with EPSG:4326 and the following GCP: mapX,mapY,pixelX,pixelY,enable -74,20.1666666666700003,2053.94253295474391052,-2419.17835250553116566,1 -73,20,5225.22388495872564818,-2983.42925651106543228,1 -72,20,8392.67980710504343733,-2983.42925651106588703,1 -71,20,11579.26287853968642594,-2991.08011622639514826,1 ...


My Spanish (Portuguese?) is rusty but I'm going to guess that it refers to the Greenwich Meridian, so your map is probably in some form of Lat/Long with 0 degrees at Greenwich so try EPSG:4326 first. To really determine the projection we'd need more details than just the prime meridian.


WGS 1984 has had several "releases". I'm not sure whether or not to call them re-adjustments. WGS 1984 is loosely tied to the International Terrestrial Reference Frame (ITRF), maintained by IERS. The first transformation, WGS_1984_(ITRF00)_To_NAD_1983, assumes that WGS 1984 is the one tied to ITRF00 and the NAD 1983 realization is CORS96 or similar. That ...

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