It might be something serious... or maybe not (?) EPSG:2100 is the Greek Geodetic Rereference System 1987 ( I insist it should be named Hellenic Geodetic... etc). This Projected Coordinate Reference System is based on the GRS80 [1]
* Whenever I create a LOCATION with this code through GRASS and through QGIS-GRASS-plugin as well, g.region gives me: g.region -p projection: 99 (Transverse Mercator) zone: 0 datum: towgs84=-199.87,74.79,246.62,0,0,0,0 ellipsoid: wgs84 north: 4435095.69823435 south: 3872235.50561798 west: 134120.591 east: 591637.112 [...] * On another, manually created LOCATION I used following parameters (with the GRS80 ellispoid of course): +proj=tmerc +lat_0=0 +lon_0=24 +k=0.999600 +x_0=500000 +y_0=0 +ellps=GRS80 +towgs84=-199.87,74.79,246.62,0,0,0,0 +units=m +no_defs and g.region -p gives me correctly: g.region -p projection: 99 (Transverse Mercator) zone: 0 datum: towgs84=-199.87,74.79,246.62 ellipsoid: grs80 north: 4256000 south: 3993750 west: 225500 east: 469000 [...] * The respective "sentence" in /usr/share/proj/epsg is: <2100> +proj=tmerc +lat_0=0 +lon_0=24 +k=0.999600 +x_0=500000 +y_0=0 +ellps=GRS80 +towgs84=-199.87,74.79,246.62,0,0,0,0 +units=m +no_defs <> --- * How can I find out which epsg "file" is GRASS using when creating a LOCATION? [1] http://www.epsg-registry.org/ - Search after code 2100
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