Talk:Hellenic Geodetic Reference System 1987

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PROJ.4 setttings

Configuration file to convert WGS84 coordinates to HGRS87 (x,y) pairs using Frank Warmerdam's PROJ.4 ([1]):

+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +towgs84=-199.87,74.79,246.62,0,0,0,0 +units=m +no_defs

SV1XV (talk) 17:30, 19 October 2011 (UTC)[reply]