Re: [gdal-dev] Using -overwrite to create empty feature class

2012-02-03 Thread Even Rouault
Le vendredi 03 février 2012 22:59:36, Donovan Cameron a écrit : > FYI > > Further testing with -overwrite given your explanation > *ogr2ogr -overwrite output.shp output.shp -progress* > ...works as well but only if the files are in the same output directory Overwriting the source file with itself

Re: [gdal-dev] Using -overwrite to create empty feature class

2012-02-03 Thread Donovan Cameron
FYI Further testing with -overwrite given your explanation *ogr2ogr -overwrite output.shp output.shp -progress* ...works as well but only if the files are in the same output directory But it does report a dbf error: *ERROR 1: fread(631) failed on DBF file.* But I can still open the output for ap

RE: [gdal-dev] Missing EPSG Codes and importFromUrl

2012-02-03 Thread David Baker (Geoscience)
Howard, Thank you for your advice. For what I need now, I will most likely try your python approach. Do you know if there are any plans for GDAL/OGR to be able to work with the epsg-registry.org is the official store of the EPSG data. It would be great if we could pass a url and osr would tr

Re: [gdal-dev] Missing EPSG Codes and importFromUrl

2012-02-03 Thread Howard Butler
Caveats about importFromUrl: * It only can consume http://, not https:// * It adds Accept: application/x-ogcwkt to the headers, and so the server can respond with that data * It simply fetches the data from the URL and hands it off to SetFromUserInput, which is OSR's swiss army knife of SRS cons

Re: [gdal-dev] Issue GDAL with JPEG-compressed TIFFS

2012-02-03 Thread Even Rouault
Selon Peter Hopfgartner : I'm not sure of your exact plans, but if you want to switch to internal libtiff 4 with GDAL 1.8.1, you might get into problems with applications that link both with GDAL and external libtiff 3.9, because of symbol conflicts. If you switch your external libtiff to libtiff

Re: [gdal-dev] Issue GDAL with JPEG-compressed TIFFS

2012-02-03 Thread Peter Hopfgartner
Hi Evan Indeed, the external libtiff is used and is version libtiff-3.9.4-1.el6_0.3.x86_64. In the mean time I did a quick compile of gdal-1.9.0 with internal libtiff and the square disappeared. Probably it would be a wise decision to switch to libtiff4 quickly, as far as ELGIS is concerned.

Re: [gdal-dev] Issue GDAL with JPEG-compressed TIFFS

2012-02-03 Thread Even Rouault
Peter, Does ELGIS GDAL uses internal libtiff (4.0beta) or external libtiff (3.8 or 3.9) ? I guess it is external libtiff, and then it could explain the issues you have with overviews and JPEG compression. There have been fixes in libtiff 4 to better support that situation (multiple IFDs with compr

RE: [gdal-dev] Missing EPSG Codes and importFromUrl

2012-02-03 Thread David Baker (Geoscience)
Andy, Great reference! Thanks for the info. But, when I execute the line: var i = src.ImportFromUrl(@"http://georepository.com/search/by-name/?query=4418";); I get an error 6 of 6. This gets back to my second question, can, and if so, how does one call on a URL to get the parameter info ?

[gdal-dev] Issue GDAL with JPEG-compressed TIFFS

2012-02-03 Thread Peter Hopfgartner
I'm doing quite some experiments with GDAL and image compression these days I do have an issue with geotiff 1.3/gdal 1.8.1 on CentOS 6 with packages from ELGIS. The story goes like this: I create tiffs with gdal_translate -of GTiff -co COMPRESS=JPEG -co JPEG_QUALITY=90 -co "TILED=YES" -co "B