[postgis-users] Area and scale completely wrong

[Johan Wehtje]

Nicholas,
I remain a  little unclear about how I determine which SRID to transform to.
I have Waypoints downloade from a garmin GPS, and I used WGS84 (SRID 4326)
to import the waypoints. I Assume the porblem is that I have the data in Lat
Long Decimal Degrees - But I cannot see a corresponding Geographic SRID for
WGS 84.
( I am thinking that loading GPS Co-ords into Postgis would have to be good
Candidate for an FAQ question).
Any ideas?
Cheers
Johan Wehtje

On 11/15/05, Johan Wehtje <genwolf at gmail.com> wrote:
>
> 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
> > _______________________________________________
> > postgis-users mailing list
> > postgis-users at postgis.refractions.net
> > http://postgis.refractions.net/mailman/listinfo/postgis-users
> >
>
>
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