2011/7/18 Jorge Arévalo <[email protected]>: > Hello, > > Is GDAL prepared for not equally sized tiled rasters? I mean this > http://dl.dropbox.com/u/6599273/irregularly_tiled_raster_coverage.png > > I think if my raster coverage has that arrangement, I can get rid of > the GDAL "block" concept. Am I right? > > Many thanks in advance, and best regards
Jorge, GDAL can only expose regular blocking to applications and only use regular blocking in the block cache. So if you format has irregular blocking you wlil need to handle the blocking all within your driver. The irregularity of the blocks was not entirely clear from the picture. If the only irregularity is partial blocks on the right or bottom then that is not a problem. You can just treat that as larger - extending beyond the dataset edge and the contents outside the dataset are irrelavent. Also, missing tiles are fine. We normally just treat them as having some background value when they are read. NODATA pixel values, masks or alpha bands can be used to indicate areas where there is no real data (missing blocks, etc). Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [email protected] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
