Re: [gdal-dev] Transform from lat/long/elevation to 3d sphere

2009-07-03 Thread Adam Nowacki
Something like: OGRSpatialReference sr; sr.SetFromUserInput("+proj=geocent"); Christopher Hunt wrote: Sorry for the hopefully not so dumb question here. If I want to transform from one projection to a projection of the earth in 3D, how would I set up my target srs? I want to take a WGS-84 la

Re: [gdal-dev] Transform from lat/long/elevation to 3d sphere

2009-07-03 Thread Christopher Hunt
That appears to do exactly what I want. Thanks. Peter, thoughts? On 03/07/2009, at 10:07 PM, Adam Nowacki wrote: Something like: OGRSpatialReference sr; sr.SetFromUserInput("+proj=geocent"); ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://

Re: [gdal-dev] Transform from lat/long/elevation to 3d sphere

2009-07-03 Thread Christopher Hunt
Hi Peter, Thanks for your reply - yes, that's exactly what I want to do - transform to cartesian coords. Here's the math that I've already got... I was just wondering if GDAL's transform object somehow encapsulated it. latitude *= DEG_TO_RAD; longitude *= DEG_TO_RAD; double s

[gdal-dev] Transform from lat/long/elevation to 3d sphere

2009-07-03 Thread Christopher Hunt
Sorry for the hopefully not so dumb question here. If I want to transform from one projection to a projection of the earth in 3D, how would I set up my target srs? I want to take a WGS-84 lat/long/elevation and have an x,y,z returned in metres. Here's my present code: // Read the image