-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Norman Vine schrieb: > Martin Spott writes: > >>I'm currently uncertain if we really can store the _whole_ scenery in >>PostGIS. Our elevation data currently comes as raster data but maybe >>it makes sense to convert that into contour lines - which we finally >>can store in such a database as well. Does this make sense, Norman, or >>will this eliminate our ability to alter the data with 'common' tools ? > > > Why not just store the Elevation data in a mixed record type of a > Polygon with a BLOB field ?
I wouldn't store contour lines as you'll allways loose precision by converting the data (DEM -> contour lines -> triangle mesh). Beeing able to change the elevation data can be important, especially when you are puting a finer grid over the data. I dunno what is possible with PostGIS but the most intuitive solution would be to store additional elevation data on arbitrary positions. Then the resulting mesh could be calculated by a weighted average (using the 2D distance) of the cutom elevation and the underlaying DEM. CU, Chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFCyYSZlhWtxOxWNFcRAvW6AKCL/lc6zq4xuDtHKnE5bRMkjh9amQCdG9Vy 9e8Ihp/XgLydtYH5yEvSTbg= =pR6o -----END PGP SIGNATURE----- _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
