[Qgis-user] Projection question

Mikhail Umorin Mikhail.Umorin at twdb.state.tx.us
Thu Apr 2 06:43:27 PDT 2009


Privet, Maxim —

I am not 100% sure, but I am reasonably certain: I got them from a
public Texas agency that provides spatial data (www.tnris.org). How do I
find out for sure?

Mikhail.

>>> On 3/31/09 at 8:25 PM, in message
<419243249.20090331202551 at gis-lab.info>,
Maxim Dubinin <sim at gis-lab.info> wrote:
> Privet Mikhail,
> 
> Are you sure both shape and geoTIFF projections are assigned
> correctly? I mean is data really in the projection you says it is?
> 
> -- 
> Maxim
> 
> Вы писали 31 марта 2009 г., 20:08:01:
> 
> MU> Hello —
> 
> MU> I have a problem with rendering layers with different
projections. I
> MU> have an SHP file with "+proj=longlat +ellps=GRS80 +datum=NAD83
+no_defs"
> MU> and a geoTIFF file with "+proj=longlat +ellps=WGS84 +datum=WGS84
> MU> +no_defs". That's all the projection data from "Properties". They
cover
> MU> exactly the same area but do not even overlap in QGIS. I also
noticed
> MU> that when geotiff file is rendered the distances that should be
3
> MU> degrees are shown as about 10 degrees (my project options are set
to
> MU> Decimal Degrees) . I suspect that there is some confusion with
> MU> meters/feet somewhere in the reprojection process. 
> 
> MU> Is there any way to add "+units" option to the description of
the
> MU> layer's projection? Would this solve the problem?
> 
> MU> Thank you for your time, 
> 
> MU> Mikhail.
> MU> _______________________________________________
> MU> Qgis-user mailing list
> MU> Qgis-user at lists.osgeo.org 
> MU> http://lists.osgeo.org/mailman/listinfo/qgis-user



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