[GRASS-user] towgs84 datum parameters for "Hong Kong 1980"

[Nikos Alexandris]

Does this help... http://spatialreference.org/ref/epsg/2326/proj4/ ?


 
On Thu, 2007-12-13 at 11:51 +0100, Otto Dassau wrote:
> Hi, 
> 
> I need some help to add support for "Hong Kong 1980" datum in GRASS. I
> have a wkt file with following information:
> 
> PROJCS["Hong_Kong_1980_Grid",GEOGCS["GCS_Hong_Kong_1980",DATUM["D_Hong_Kong_198
> 0",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT
> ["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["Fal
> se_Easting",836694.05],PARAMETER["False_Northing",819069.8],PARAMETER["Central_
> Meridian",114.1785555555556],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_
> Of_Origin",22.31213333333334],UNIT["Meter",1.0]]
> 
> The datum D_Hong_Kong_1980 does not exist in GRASS yet. I found following
> parameters and added them to the datum.table file:
> 
> # Hong Kong Datum 1980
> hk80     "Hong_Kong_1980"   international    dx=-156    dy=-270    dz=-189
> 
> Now I am missing the Datum Transformation Parameters to add to the
> datumtransform.table. 
> 
> I hope that someone has experience with "Hong_Kong_1980_Grid", can confirm,
> what I found so far and maybe add the missing datum transformation parameters
> or knows where I can find more about it?
> 
> thanks a lot
>  Otto
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-- 
Nikos Alexandris
.
Department of Remote Sensing & Landscape Information Systems
Faculty of Forestry & Environmental Sciences, Albert-Ludwigs-University Freiburg
.
Tel.  +49 (0) 761 203 3697 / Fax.  +49 (0) 761 203 3701 / Skype: Nikos.Alexandris
.
Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany
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