[gdal-dev] Issue reprojecting geo tiff

[Reaves, Timothy]

Ah, leaving the -s_srs off does indeed work too; so much for following
examples! :)


On Wed, Aug 14, 2013 at 9:34 AM, Even Rouault
<even.rouault at mines-paris.org>wrote:

> Le mercredi 14 août 2013 14:24:56, Reaves, Timothy a écrit :
> > I'm using GDAL 1.10.0, released 2013/04/24 .  I am playing with TileMill,
> > and want to add USGS topo maps. These topo maps are geo PDF.  I'm
> following
> > along one of their documents, and the first thing I do is convert the PDF
> > to TIFF.
> >
> > gdal_translate -of GTiff -co "TILED=YES" -co "TFW=YES"
> > PA_Tionesta_20130621_TM_geo.pdf PA_Tionesta_20130621_TM_geo.tiff
> > ERROR 1: Couldn't find group for reference to set OFF
> > Input file size is 13652, 17403
> > 0...10...20...30...40...50...60...70...80...90...100 - done.
> >
> > I do not like the ERROR; that should mean that the conversion failed;
> > however, and output TIFF is generated.  So I use it.
>
> You can probably ignore it, but I'm not 100% sure without investigation.
> This
> error seems to come from Poppler. Might be linked to code turning layers
> on.
> If this error has consequences, they will be layers not displayed in the
> PDF.
>
> >
> > The next step is the re-translation:
> >
> > gdalwarp -s_srs EPSG:4269 -t_srs EPSG:3785 -r bilinear
> > PA_Tionesta_20130621_TM_geo.tiff PA_Tionesta_20130621_TM_geo_3785.tiff
> > ERROR 1: Too many points (10201 out of 10201) failed to transform,
> > unable to compute output bounds.
> >
> > This ERROR does not create output.
>
> Just drop the "-s_srs EPSG:4269". As the GeoPDF driver recognizes the input
> projection, it is completely useless to specify it. The error here is that
> the
> source data is in EPSG:26717 (UTM 17 / NAD 83), not EPSG:4269 (geodetic NAD
> 83).
>
>
> --
> Geospatial professional services
> http://even.rouault.free.fr/services.html
>
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