Custom CRS/SRS (Malaysia)

[Bruce Foster]

All,

Apologies if this has been asked before and cross posting. Well, in dire situation.

I'm working on a project in Malaysia and the ran into major road block because of the local projection. All existing datasets are in older Cassini projection. They have 9 state level Cassini projection for cadastal work and they have different origin. It uses Everest 1830 Modified for spheroid.

They are moving to their new projection called GDM2000 and they have EPSG entries. But the older cassini dont have EPSG entries. this puts me in real fix.

ArcGIS has the projection parameters for cassini and I dont find any details in spatialreferece or EPSG.org.

My work involves GeoServer and PostGIS. Can you plesae guide and help me with this? How do I put a custom projection and how do I work on a projection that dont have EPSG? Since we work lot on EPSG with GeoServer and PostGIS, how can we support the non standard one.

This is the CRS parameters;

PROJCS["Malaysia_Cassini_Kelantan",GEOGCS["GCS_Kertau",DATUM["D_Kertau",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Cassini"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",102.8952083],PARAMETER["Scale_Factor",1],PARAMETER["Latitude_Of_Origin",4.946141667],UNIT["Meter",1]]

any guru out there help me?

another question, can this be reprojected to WGS84 using on the fly reprojection in GeoServer and PostGIS?

Thanks a lot

Bruce Foster

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[Justin Deoliveira]

Hi Bruce,

If you are using GeoServer you may wish to post to the geoserver-users
list :).

The the answer is described here:

http://geoserver.org/display/GEOSDOC/Custom+projection+definition+in+Geoserver+1.5.0+(onwards)

Basically just edit a property file which maps an epsg code you make up
to some arbitrary WKT which defines the projection.

-Justin

Bruce Foster wrote:

> All,
>
> Apologies if this has been asked before and cross posting. Well, in dire
> situation.
>
> I'm working on a project in Malaysia and the ran into major road block
> because of the local projection. All existing datasets are in
> older Cassini projection. They have 9 state level Cassini projection for
> cadastal work and they have different origin. It uses Everest 1830
> Modified for spheroid.
>
> They are moving to their new projection called GDM2000 and they have
> EPSG entries. But the older cassini dont have EPSG entries. this puts me
> in real fix.
>
> ArcGIS has the projection parameters for cassini and I dont find any
> details in spatialreferece or EPSG.org.
>
> My work involves GeoServer and PostGIS. Can you plesae guide and help me
> with this? How do I put a custom projection and how do I work on a
> projection that dont have EPSG? Since we work lot on EPSG with GeoServer
> and PostGIS, how can we support the non standard one.
>
> This is the CRS parameters;
>
> PROJCS["Malaysia_Cassini_Kelantan",GEOGCS["GCS_Kertau",DATUM["D_Kertau",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Cassini"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",102.8952083],PARAMETER["Scale_Factor",1],PARAMETER["Latitude_Of_Origin",4.946141667],UNIT["Meter",1]]
>
> any guru out there help me?
>
> another question, can this be reprojected to WGS84 using on the fly
> reprojection in GeoServer and PostGIS?
>
> Thanks a lot
>
> Bruce Foster
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> MetaCRS mailing list
> [hidden email]
> http://lists.osgeo.org/mailman/listinfo/metacrs

--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.
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