[postgis-users] Area and scale completely wrong

Johan Wehtje genwolf at gmail.com
Mon Nov 14 05:14:10 PST 2005


Thanks Nicolas.
I will give that a try

On 11/15/05, Nicolas Ribot <nicky666 at gmail.com> wrote:
>
> > Thanks Baren and strk - that was the problem, the file was in decimal
> > degrees.
> >
> > Can these files be used in Postgis ? is it just a matter of finding
> another
> > SRID, or do I have to convert them sowehow?
> >
>
> Hello Johan
> You can use these files in Postgis, setting the right SRID for them.
> (a geographic system in your case)
> You may also transform them to another reference system by knowing the
> source and target spatial reference systems SRID. (transform()
> function).
> Storing them in lat-long won't allow you to compute precise distances,
> areas.
> So transforming them to a cartesian reference system is a good option.
> Look in the spatial_ref_sys table to find the SRID corresponding to
> your projection.
>
> Nicolas
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