[GRASS-user] Import CH1903 Referenced Geodata

[marc.monnerat at bluewin.ch]

Hello,

The EPSG for your data (coordinates y in the range 600000 and x in the 200000) is EPSG:21781
http://www.spatialreference.org/ref/epsg/21781/
This is the old legal system, still widely used

The other system used in Switzerland is (new, but hardly used) is 
CH1903+ / LV95
http://www.spatialreference.org/ref/epsg/2056/
Same coordinates x,y + 2'000'000 and 1'000'000 respectively (to make simple)

Marc

----Message d'origine----
De: hellik at web.de
Date: 13.11.2008 22:36
À: <grass-user at lists.osgeo.org>
Objet: [GRASS-user] Import CH1903 Referenced Geodata

Hi Adrian,


if you open a e00-file from the same web-site in an texteditor, you can find the following projection info:

  Projection        OBLIQUE
  ~
  Units             meters
  ~
 Spheroid          BESSEL
 ~
 Datum             user_defined 674. 14. 405.
 ~
 Parameters
 ~
 2                 /* Projection type < 1 | 2 >
 ~
 1                 /* Scale factor at the projection's center  
 ~
 7 26 22.5         /* Longitude of the projection's center (DMS) 
 ~
 46 57 08.66       /* Latitude  of the projection's center (DMS)
 ~
 90.000000         /* Azimuth at the projection's center   
 ~
 -9419820.5907     /* False easting  (meters) 
 ~
  200000.0000     /* False northing (meters)


Hope this helps to find and define the right projection to import the shapefile.

Best regards
helli

>Hello There,

>I'm trying to import the sample shapefile from

>http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/downloads/landscape/vector25.html

>(ArcView Shapefile) into GRASS 6.3.

>I guess the Coordinate Reference System for the data is CH1903+ /LV95, 
>EPSG code 2056.
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