Le mercredi 06 juillet 2016 16:17:32, Daniele Romagnoli a écrit : > Hi Even, > thanks I'm already using the SPARSE_OK=TRUE to create an empty tiff > and afterwards warp input files on that with SKIP_NOSOURCE=YES. > I have already updated the ImageIO-EXT's TIFFImageReader to deal with > tile/strip with zero byte count. > > Final question: > Starting from which GDAL version, SPARSE_OK=TRUE and SKIP_NOSOURCE=YES are > supported?
Woo, a long time. I wasn't probably even born when they were added. Digging a bit in history shows that SPARSE_OK was added in 2008 / GDAL 1.6 and SKIP_NOSOURCE in 2006... Returning the nodata value for implicit blocks instead of 0 was added in 1.7. > > Thanks for your feedbacks. > Cheers, > Daniele > > > On Wed, Jul 6, 2016 at 3:53 PM, Even Rouault <even.roua...@spatialys.com> > > wrote: > > Daniele, > > > > > has this improvement also being backported on previous versions (as an > > > instance 2.1.x, 2.0.x)? > > > > No, trunk only. > > > > You could as well use the SPARSE_OK=TRUE creation option to avoid > > writting blocks at all. Provided that your reader knows how to deal with > > tile/strips with a 0 byte count (GDAL based readers back to the older > > days are OK) > > > > Even > > > > > Cheers, > > > Daniele > > > > > > On Tue, May 10, 2016 at 3:29 PM, Even Rouault < > > > > even.roua...@spatialys.com> > > > > > wrote: > > > > Le mardi 10 mai 2016 09:22:19, jramm a écrit : > > > > > Hi > > > > > I have made changes to FillEmptyTiles so that if nodata is set, > > > > > then > > > > it > > > > > > > will always fill with nodata, otherwise 0. > > > > > > > > > > I have attached the raw diff...I have no idea how to submit a > > > > > change request/review etc? > > > > > > > > > > fillempty_nodata.diff > > > > > < > > > > http://osgeo-org.1560.x6.nabble.com/file/n5265514/fillempty_nodata.dif > > > > > > > f > > > > > > > > I've committed in trunk a more complete version of your patch since > > > > on reflection there was also the case of non power-of-two bit depths > > > > to handle. > > > > > > > > Patches are better handled as attachments to Trac tickets. > > > > > > > > Even > > > > > > > > -- > > > > Spatialys - Geospatial professional services > > > > http://www.spatialys.com > > > > _______________________________________________ > > > > gdal-dev mailing list > > > > gdal-dev@lists.osgeo.org > > > > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > -- > > Spatialys - Geospatial professional services > > http://www.spatialys.com -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev