Terr80E0

80 Km tile width grid ventred on the Greenwich meridian, 0E form 15W to 15E. Covers North West Europe. The c or column offset is 512 which is G0 in base 32. The c offset for North East Europe will be 1536 or 1G0 in base 32. Current y offset is 300 for the equator. The Old c offset was 200 so a diff of 312