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 <[email protected]>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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