Even Rouault wrote: > Perhaps you could play with the SIMPLIFICATION and SIMPLIFICATION_MAX_ZOOM > options ? Sure, as I wrote I admit that my test did not make much sense, but trying things before reading the manual sometimes reveals something interesting.
> Perhaps you should also use an already simplified layer for the lowest zoom > level (see the CONF option) For sure yes, coordinate space of 4096x4096 is far too small for this dataset. > Are you sure you get polygons with less than 4 points ? Normally they should > be discarded. Quite sure yes by looking at what the ST_IsValidReason from the SQLite dialect prints ST_IsValidReason(geometry) (String) = Invalid: Toxic Geometry ... too few points There are other variants of invalid geometries and actually a few valid as well. Here is one example with an invalid component MULTIPOLYGON (((516384 6815744,516384 6815744,532768 6815744,516384 6815744)), ((516384 6815744,516384 6815744)),((516384 6815744,516384 6815744))) My zero tile is here http://www.latuviitta.org/downloads/0.pbf -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
