[GRASS-user] Creating with GRASS (and QGIS) a LOCATION with EPSG:2100 assingns the wgs84 ellipsoid instead of grs80!

[Nikos Alexandris]

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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