Do not use a local system. For everything larger than 200meters you need a srs definition, because you can't messure it exactly.
Take a projection from your living area und shift your geometrys to the right place. -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von tommy408 Gesendet: Dienstag, 30. Juni 2009 12:26 An: [email protected] Betreff: [postgis-users] Define spatial reference system for local datum I don't need special projection. My map is a flat plane so I'm trying to use local datum as my srs because a bunch of gis map design tool ask for it. So I'm trying to add a new srs into postgis spatial_ref_sys table with the following srstext LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter", 1],AXIS["X",EAST],AXIS["Y",NORTH]] What do I put for proj4text? -- View this message in context: http://www.nabble.com/Define-spatial-reference-system-for-local-datum-tp24269524p24269524.html Sent from the PostGIS - User mailing list archive at Nabble.com. _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
