[Gdal-dev] Question about reprojecting a Shapefile

[Frank Warmerdam]

On 5/4/07, Luke Roth <roth.luke at gmail.com> wrote:
> Hello all,
>
> I've been using GDAL for some time, but am fairly new at using OGR.
> I've started by trying to reproject a shapefile from geographic
> coordinates into another coordinate system (LCC) using ogr2ogr and
> when I look at the output it looks like the .prj file is incomplete
> (missing datum) and the features are in the wrong locations.  What am
> I missing?  I've read through the archives, but I didn't see anything
> like this mentioned.
>
> My command line looks like:
> ogr2ogr -overwrite -f  "ESRI Shapefile" -t_srs "+ellps=WGS84 +proj=lcc
> +lon_0=-82.85w +lat_0=40.39n +lat_1=39.39n +lat_2=41.39n"
> "c:\images\output.shp" "c:\images\input.shp"


Luke,

Try this with +datum=WGS84 instead of +ellps=WGS84 for
the target srs.  I believe this will fix the problem.  Stating
the ellipse is a lot less specific than stating the datum.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent