[postgis-users] Custom CRS/SRS

[Paul Ramsey]

Bruce,
Can you provide a known projected point?
(x,y) in the old system
(lat,lon) in WGS84
Would help verify.
P

On Thu, May 28, 2009 at 9:25 AM, Bruce Foster <gis.foster at gmail.com> 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
>
>
>
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