[Gdal-dev] Query regarding coordinate system transformation using GDAL

[viritha 30]

Hi Friends,

                  I am working on GDAL library. I have some doubts in using
it. I want to convert the geographic coordinate system into any other
projection coordinate system. That is. i want the converted values of WGS84
latitude and longitude values in any other projection coordinate system like
UTM or Mercator2SP.......etc. And also i want to retrieve the zone number
from this . If anyone know abou this convertion using GDAL library or
OGRSpatial Reference class, please mail me. its very urgent for me.

I am giving the code  i am working. i dont know how to go forward . plz help
me. i am doing it in VC++ on Windows.

{
 OGRSpatialReference osRS,oosRS ;
 char *pszWKT=NULL;
 char *pszaWKT=NULL;
 CString str;

 osRS.SetWellKnownGeogCS("WGS84");
 osRS.exportToWkt(&pszWKT);
 str.Format("%s",pszWKT);
 MessageBox(str);


  oosRS.SetProjCS("Mercator_2SP");
 oosRS.SetWellKnownGeogCS("EPSG:9805");
 oosRS.SetHOM(0, 75, 90.0, 90.0,1.0, 500000, 0);
 oosRS.exportToWkt(&pszaWKT);
 str.Format("%s",pszaWKT);
 MessageBox(str);
void *reProjTransform=GDALCreateReprojectionTransformer(pszWKT,pszaWKT);
 /////////////////
I dont know wat to do after this. how to get the converted latitude and
longitude values.
}




I even tried with the            OGRCreateCoordinateTransformation()
function. by passing the two coordinate systems in WKT format. still i was
strucked.

plz help me.
-- 
Regards,
Viritha.B
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/gdal-dev/attachments/20070710/e0094159/attachment.html