Hi, I have two different geotiff-charts which have the same number of pixels, and similar information when viewing in gdalinfo, but one misbehaves while tiling. For the problem chart, only the zoom levels 0-6 are tiled, but for the correctly handled chart, zoom levels 4-11 are tiled. Both are around 23000x15000 pixels and 72 dpi. So, what decides the zoom levels? I thought it was pixels and dpi.. gdalinfo on the working chart gives: Coordinate System is: Size is 15108, 23181 GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]] Origin = (167.635052101782918,-27.435225354710909) Pixel Size = (0.000619744987014,-0.000517525434692) Metadata: AREA_OR_POINT=Area Image Structure Metadata: COMPRESSION=LZW INTERLEAVE=PIXEL Corner Coordinates: Upper Left ( 167.6350521, -27.4352254) (167d38' 6.19"E, 27d26' 6.81"S) Lower Left ( 167.6350521, -39.4319825) (167d38' 6.19"E, 39d25'55.14"S) Upper Right ( 176.9981594, -27.4352254) (176d59'53.37"E, 27d26' 6.81"S) Lower Right ( 176.9981594, -39.4319825) (176d59'53.37"E, 39d25'55.14"S) Center ( 172.3166057, -33.4336039) (172d18'59.78"E, 33d26' 0.97"S) Band 1 Block=15108x1 Type=Byte, ColorInterp=Red Mask Flags: PER_DATASET ALPHA Band 2 Block=15108x1 Type=Byte, ColorInterp=Green Mask Flags: PER_DATASET ALPHA Band 3 Block=15108x1 Type=Byte, ColorInterp=Blue Mask Flags: PER_DATASET ALPHA Band 4 Block=15108x1 Type=Byte, ColorInterp=Alpha gdalinfo on the problem chart gives: Size is 15319, 23593 Coordinate System is: GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]] Origin = (176.502369113268770,-25.635284667174400) Pixel Size = (0.000619910224237,-0.000526829594898) Metadata: AREA_OR_POINT=Area Image Structure Metadata: COMPRESSION=LZW INTERLEAVE=PIXEL Corner Coordinates: Upper Left ( 176.5023691, -25.6352847) (176d30' 8.53"E, 25d38' 7.02"S) Lower Left ( 176.5023691, -38.0647753) (176d30' 8.53"E, 38d 3'53.19"S) Upper Right ( 185.999, -25.635) (185d59'55.59"E, 25d38' 7.02"S) Lower Right ( 185.999, -38.065) (185d59'55.59"E, 38d 3'53.19"S) Center ( 181.251, -31.850) (181d15' 2.06"E, 31d51' 0.11"S) Band 1 Block=15319x1 Type=Byte, ColorInterp=Red Mask Flags: PER_DATASET ALPHA Band 2 Block=15319x1 Type=Byte, ColorInterp=Green Mask Flags: PER_DATASET ALPHA Band 3 Block=15319x1 Type=Byte, ColorInterp=Blue Mask Flags: PER_DATASET ALPHA Band 4 Block=15319x1 Type=Byte, ColorInterp=Alpha Regards /Per |
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