export map image

[konradenzensberger]

Hi,

i need to create map images by opening an Mxd file and export an image.
i use IMapServer::ExportMapImage(...) to create a map image,
in general this works.

But how can i set a SpatialReference for the images which is different from Mxd file ?
All exported images should be created in esriSRGeoCSType::esriSRGeoCS_WGS1984

This code will not work:

ISpatialReferenceFactoryPtr sRefEnv(CLSID_SpatialReferenceEnvironment);
IGeographicCoordinateSystemPtr pGeoSys;
esriSRGeoCSType egt = esriSRGeoCSType::esriSRGeoCS_WGS1984;
sRefEnv->CreateGeographicCoordinateSystem(egt,&pGeoSys);
ISpatialReferencePtr pSrc = pGeoSys;

//pMapDesc is type of IMapDescription interface
pMapDesc->putref_SpatialReference(pSrc);

//if i set putref_SpatiaReference like above, this call crashes
// pMapServer is type of IMapServer interface
pMapServer->ExportMapImage(...)

any idea what is wrong ?

[DavidLednik]

Hi,

On Server the projection is "locked" to the first layer in the mxd list and all other dynamic layers are automatically reprojected
to that projection. So I think it's a dead end street.

What might work is open your MXD in mapcontrol (or in memory) like you would in ArcMap;
change the projection there and create an image from that.

Regards,
David