[GRASS-user] strange ETRS89 settings and v.out.ogr

Tim Michelsen timmichelsen at gmx-topmail.de
Fri Aug 15 10:58:10 EDT 2008


Hello,
I defined a test location in ETRS89-LAEA using the EPSG number 3035 in the GRASS
startup wizard.

Here is what g.proj -p > test_3035_proj.txt prints out:
-PROJ_INFO-------------------------------------------------
name       : Lambert Azimuthal Equal Area
proj       : laea
datum      : etrs89
ellps      : grs80
lat_0      : 52
lon_0      : 10
x_0        : 4321000
y_0        : 3210000
no_defs    : defined
-PROJ_UNITS------------------------------------------------
unit       : metre
units      : metres
meters     : 1

Now I exported a data set to a shapefile using v.out.ogr. Here is the content of
the associated *.prj file:

Layer SRS WKT:
PROJCS["Lambert Azimuthal Equal Area",
    GEOGCS["grs80",
        DATUM["ETRF_1989",
            SPHEROID["Geodetic_Reference_System_1980",6378137,298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["Degree",0.017453292519943295]],
    PROJECTION["Lambert_Azimuthal_Equal_Area"],
    PARAMETER["latitude_of_center",52],
    PARAMETER["longitude_of_center",10],
    PARAMETER["false_easting",4321000],
    PARAMETER["false_northing",3210000],
    UNIT["Meter",1]]
cat: Real (11.0)
a_cat: Real (11.0)
a_CODE_00: String (80.0)
b_cat: Real (11.0)
b_cat_: Real (24.15)
b_na2: String (80.0)

If I load this into ArcGIS it does complain about wrong projection information.

Here is the project file when reprojecting the data set to 3035 with ogr2ogr:
Layer SRS WKT:
PROJCS["ETRS89 / ETRS-LAEA",
    GEOGCS["ETRS89",
        DATUM["European_Terrestrial_Reference_System_1989",
            SPHEROID["GRS_1980",6378137,298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["Degree",0.017453292519943295]],
    PROJECTION["Lambert_Azimuthal_Equal_Area"],
    PARAMETER["latitude_of_center",52],
    PARAMETER["longitude_of_center",10],
    PARAMETER["false_easting",4321000],
    PARAMETER["false_northing",3210000],
    UNIT["Meter",1]]
cat: Real (11.0)
a_cat: Real (11.0)
a_CODE_00: String (80.0)
b_cat: Real (11.0)
b_cat_: Real (24.15)
b_na2: String (80.0)


Is the GRASS projection file wrong or is it not "standard"? From the content
they both seem to tell the same...

I would appreciate any hint or clarification.

Thanks



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