2009/9/30 Andy Robinson (blackadder-lists) <[email protected]> > > Does this mean that when you have in the past pulled way length totals from > the pgsql db that the values will not be true to life? >
If you want to obtain length in meters, you need a database that supports geodesic models. Postgis only supports with ST_Distance_Sphere or ST_Distance_Spheroid and only between two points. Geodesic support is quite difficult to get. Then again, you can probably use an UTM projection in part of the world to get a distance in that part of the world that would more or less accurate. Emilie Laffray
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