[gdal-dev] Appending to an existing GeoPackage raster table

2017-10-06 Thread Brad Hards
I'm trying to find a way to append data to an existing geopackage raster layer using GDAL. The specific case is to use different sources (or different configurations of a source like WMS) at different zoom levels, but extending an existing table at the same zoom might also be useful. As an exampl

Re: [gdal-dev] vrt and too many open files error

2017-10-06 Thread Even Rouault
On vendredi 6 octobre 2017 17:29:40 CEST Julien Michel wrote: > Dear all, > > I have a VRT file, which I generated by a script I wrote, that simply > mosaics 2750 tiles (images of the same size). I can not read back this > vrt file with gdal, it says: > > $ gdalinfo cloud_plain.vrt > > ERROR 4:

[gdal-dev] vrt and too many open files error

2017-10-06 Thread Julien Michel
Dear all, I have a VRT file, which I generated by a script I wrote, that simply mosaics 2750 tiles (images of the same size). I can not read back this vrt file with gdal, it says: $ gdalinfo cloud_plain.vrt ERROR 4: Too many open files gdalinfo failed - unable to open 'cloud_plain.vrt'. Rea

Re: [gdal-dev] Potential issue with gdaladdo overviews setting alpha channel to nodata value instead of zero

2017-10-06 Thread Even Rouault
On vendredi 6 octobre 2017 13:01:29 CEST Tim Waters wrote: > Even, > > Many thanks! This did fix the issue. > Agreed, having both nodata and transparency would confuse things, and I see > that this way also ensures that it works well with cropped maps with pure > black pixels. I've changed in tru

Re: [gdal-dev] Potential issue with gdaladdo overviews setting alpha channel to nodata value instead of zero

2017-10-06 Thread Tim Waters
Even, Many thanks! This did fix the issue. Agreed, having both nodata and transparency would confuse things, and I see that this way also ensures that it works well with cropped maps with pure black pixels. Best regards, Tim On 5 October 2017 at 22:21, Even Rouault wrote: > On jeudi 5 octob

Re: [gdal-dev] Compiling GDAL 2.2.2 with Informix (IDB) driver on Ubuntu 16.04

2017-10-06 Thread Roel Huybrechts
Hi Even, > Is /opt/informix/lib/c++ in the search path for shared librariies ? > That is: did you define LD_LIBRARY_PATH to point to it ? Or put it in > /etc/ld.so.conf and ran ldconfig afterwards ? I didn't define LD_LIBRARY_PATH or put it in ld.so.conf, as I didn't have to do it in my Debian Tes