Re: Define spatial reference system for local datum

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.

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Von: postgis-users-bounces@... [mailto:postgis-users-bounces@...] Im Auftrag von tommy408
Gesendet: Dienstag, 30. Juni 2009 12:26
An: postgis-users@...
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?
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