[GRASS-dev] Projection problem: Indian_1954_UTM_Zone_48N, GRASS: Datum unknown

GRASS GIS GRASS GIS developer
1

PROJCS["Indian_1954_UTM_Zone_48N",
    GEOGCS["GCS_Indian_1954",
        DATUM["Indian_1954",
            SPHEROID["Everest_Adjustment_1937",6377276.345,300.8017]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",500000.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",105.0],
    PARAMETER["Scale_Factor",0.9996],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]

GRASS g.region -p after setting up a location from that shapefile

projection: 1 (UTM)
zone: 48
datum: ** unknown (default: WGS84) **
ellipsoid: everest
north: 2491572.35770828
south: 1346722.68241944
west: -124919.66806446
east: 866700.463284
nsres: 57242.48376444
ewres: 49581.00656742
rows: 20
cols: 20
cells: 400

I can provide a shapefile to whoever is interested

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2

On Fri, Jun 14, 2013 at 9:03 AM, Yann Chemin <ychemin@gmail.com> wrote:

PROJCS["Indian_1954_UTM_Zone_48N",
    GEOGCS["GCS_Indian_1954",
        DATUM["Indian_1954",

... probably needs to be registered here?

http://trac.osgeo.org/grass/browser/grass/trunk/lib/gis/datumtransform.table

            SPHEROID["Everest_Adjustment_1937",6377276.345,300.8017]],

...

projection: 1 (UTM)
zone: 48
datum: ** unknown (default: WGS84) **
ellipsoid: everest

...

Yann, could you find the towgs84 parameters?

Markus

3

Yann wrote:

GRASS g.region -p after setting up a location from that
shapefile

the important result to see is that of 'g.proj -p'. (i.e. the
PROJ_INFO file)

thanks,
Hamish