User:Sv1xv/sandbox

HGRS87 projection
HGRS87 also specifies a  (TM) with m0=0.9996, covering six degrees of longitude either side of 24 degrees east (18-30 degrees east). This way all Greek territory (stretching to approximately 9° of longitude) is projected in one zone. References are in meters. Northings are counted from the Equator. A false easting of 500000 m is assigned to the central meridian (24° east), so eastings are always positive.

Conversion from geographical coordinates in GRS80 to a projection in HGRS87 is supported by ((w|[[PROJ.4}} with appropriate parameters. The conversion is performed with the following code (shell command line):