[postgis-users] Transformations to RT90 2.5 gon W have a ~200 m error

[Markus Schaber]

Hi, Lars,

Lars Luthman schrieb:

> Are the RT90 2.5 gon W systems in the spatial_ref_sys table incorrect,
> or am I using them incorrectly?
> 
> Is there any way to insert my approximation into spatial_ref_sys and use
> that instead? I suppose it would have to be changed so it projects long
> lat to X Y instead, and I would need some sort of srtext. I really don't
> know much about proj or the srtext format though.

As the spatial_ref_sys table is imported from proj data, could you check
your data projection via the proj tools. If proj tools give equally
incorrect results, this is an issue for the proj maling list. If they
give correct results, you probably found a postgis bug.

Markus