id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc 6932,gdaladdo generates invalid zoom levels for GPKG,ariki,warmerdam,"Steps to reproduce: {{{ #!/usr/bin/sh # Prepare test data LEFT=500 BOTTOM=500 RIGHT=750 TOP=750 echo -e ""${LEFT} ${BOTTOM} 50\n${RIGHT} ${BOTTOM} 100\n${LEFT} ${TOP} 150\n${RIGHT} ${TOP} 200\n"" > test.xyz gdalwarp -of GTiff -ot Byte -s_srs ""EPSG:3857"" -t_srs ""EPSG:3857"" \ -te ${LEFT} ${BOTTOM} ${RIGHT} ${TOP} -tr 0.05 0.05 \ -tap -r cubic test.xyz test.tif # Create a GeoPackage gdal_translate -of GPKG -ot Byte -co TILING_SCHEME=GoogleMapsCompatible test.tif test.gpkg # Add overviews gdaladdo test.gpkg 2 4 8 16 32 64 128 256 # Dump table gpkg_tile_matrix sqlite3 -column -header test.gpkg ""SELECT * FROM gpkg_tile_matrix ORDER BY zoom_level"" }}} Output: {{{ table_name zoom_level matrix_width matrix_height tile_width tile_height pixel_x_size pixel_y_size ---------- ---------- ------------ ------------- ---------- ----------- ---------------- ---------------- test 0 1 1 256 256 156543.033928041 156543.033928041 test 1 2 2 256 256 78271.5169640205 78271.5169640205 test 2 4 4 256 256 39135.7584820102 39135.7584820102 test 3 8 8 256 256 19567.8792410051 19567.8792410051 test 4 16 16 256 256 9783.93962050256 9783.93962050256 test 5 32 32 256 256 4891.96981025128 4891.96981025128 test 6 64 64 256 256 2445.98490512564 2445.98490512564 test 7 128 128 256 256 1222.99245256282 1222.99245256282 test 8 256 256 256 256 611.49622628141 611.49622628141 test 9 512 512 256 256 305.748113140705 305.748113140705 test 10 1024 1024 256 256 152.874056570353 152.874056570353 test 11 2048 2048 256 256 76.4370282851763 76.4370282851763 test 12 4096 4096 256 256 38.2185141425881 38.2185141425881 test 13 8192 8192 256 256 19.1092570712941 19.1092570712941 test 14 16384 16384 256 256 9.55462853564703 9.55462853564703 test 15 32768 32768 256 256 4.77731426782352 4.77731426782352 test 16 65536 65536 256 256 2.38865713391176 2.38865713391176 test 17 1 1 256 256 9.55462853564703 9.55462853564703 test 18 1 1 256 256 4.77731426782351 4.77731426782351 test 19 1 1 256 256 2.38865713391176 2.38865713391176 test 20 131072 131072 256 256 1.19432856695588 1.19432856695588 test 21 262144 262144 256 256 0.59716428347793 0.59716428347793 test 22 524288 524288 256 256 0.29858214173897 0.29858214173897 test 23 1048576 1048576 256 256 0.14929107086948 0.14929107086948 test 24 2097152 2097152 256 256 0.07464553543474 0.07464553543474 test 25 4194304 4194304 256 256 0.03732276771737 0.03732276771737 }}} Something strange happens starting from zoom level 17. The tiles in table ""test"" also have these invalid zoom level values.",defect,closed,normal,,default,2.2.0,normal,fixed,,