Hi Pierre, I could try my hand at this as a PL/pgSQL function. Can't help with the C++... :)
I'm thinking ST_Densify ala Paul deriving the densification from the cell size of the input raster, then use st_dumppoints and st_intersects, and then reconstruct to 3D line (or am I thinking too low level to be efficient). Best, Steve Stephen Mather Geographic Information Systems (GIS) Manager (216) 635-3243 s...@clevelandmetroparks.com clevelandmetroparks.com -----Original Message----- From: Pierre Racine [mailto:pierre.rac...@sbf.ulaval.ca] Sent: Tuesday, March 13, 2012 2:22 PM To: s...@clevelandmetroparks.com; PostGIS Users Discussion Subject: RE: [postgis-users] 3D geometries Hi Stephen, It would certainly be very nice to have a generic function doing it: SELECT ST_SetMFromRaster(geom, rast) geom FROM mylines, myrast WHERE ST_Intersects(geom, rast) Pierre > -----Original Message----- > From: postgis-users-boun...@postgis.refractions.net [mailto:postgis-users- > boun...@postgis.refractions.net] On Behalf Of Stephen V. Mather > Sent: Tuesday, March 13, 2012 1:43 PM > To: postgis-users@postgis.refractions.net > Subject: [postgis-users] 3D geometries > > Hi All, > > Any special considerations for turning a 2D multi-line geometry into a > 3D geometry using a DEM as a RASTER within PostGIS? Has anyone played in > this arena? > > > > Thanks, > Steve > > > > http://www.clemetparks.com/images/esig/cmp-ms-90x122.pngStephen Mather > Geographic Information Systems (GIS) Manager > (216) 635-3243 > > s...@clevelandmetroparks.com > clevelandmetroparks.com <http://www.clemetparks.com/> > > > > > > > > _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
