Thanks! .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ Entre dos pensamientos racionales hay infinitos pensamientos irracionales.
On Fri, 11 Nov 2022 at 19:25, Even Rouault <[email protected]> wrote: > > Le 11/11/2022 à 19:12, Javier Jimenez Shaw a écrit : > > Hi > > I am creating a GeoTIFF file with C++. It is a large DSM (one band of > Float32). Because I am generating it, I already know the min and max values. > I would like to store the min and max values directly in the TIFF, not in > a sidecar file. Is there any gdal metadata (stored in the TIFF) that can be > used? That way, when I open it in QGIS, the range of the band will be > accurate. > > yep, see https://gdal.org/user/raster_data_model.html#raster-band > > Demo: > > $ python > from osgeo import gdal > ds = gdal.GetDriverByName('GTiff').Create('test.tif', 1, 1) > ds.GetRasterBand(1).SetMetadataItem('STATISTICS_MINIMUM', '0') > ds.GetRasterBand(1).SetMetadataItem('STATISTICS_MAXIMUM', '1') > ds.GetRasterBand(1).SetMetadataItem('STATISTICS_MEAN', '2') > ds.GetRasterBand(1).SetMetadataItem('STATISTICS_STDDEV', '3') > > > $ gdalinfo test.tif > Driver: GTiff/GeoTIFF > Files: test.tif > Size is 1, 1 > Image Structure Metadata: > INTERLEAVE=BAND > Corner Coordinates: > Upper Left ( 0.0, 0.0) > Lower Left ( 0.0, 1.0) > Upper Right ( 1.0, 0.0) > Lower Right ( 1.0, 1.0) > Center ( 0.5, 0.5) > Band 1 Block=1x1 Type=Byte, ColorInterp=Gray > Min=0.000 Max=1.000 > Minimum=0.000, Maximum=1.000, Mean=2.000, StdDev=3.000 > Metadata: > STATISTICS_MAXIMUM=1 > STATISTICS_MEAN=2 > STATISTICS_MINIMUM=0 > STATISTICS_STDDEV=3 > > $ tiffdump -m 1000 test.tif > test.tif: > Magic: 0x4949 <little-endian> Version: 0x2a <ClassicTIFF> > Directory 0: offset 8 (0x8) next 0 (0) > ImageWidth (256) SHORT (3) 1<1> > ImageLength (257) SHORT (3) 1<1> > BitsPerSample (258) SHORT (3) 1<8> > Compression (259) SHORT (3) 1<1> > Photometric (262) SHORT (3) 1<1> > StripOffsets (273) LONG (4) 1<402> > SamplesPerPixel (277) SHORT (3) 1<1> > RowsPerStrip (278) SHORT (3) 1<1> > StripByteCounts (279) LONG (4) 1<1> > PlanarConfig (284) SHORT (3) 1<1> > SampleFormat (339) SHORT (3) 1<1> > 42112 (0xa480) ASCII (2) 244<<GDALMetadata>\n <Item > name="STATISTICS_MAXIMUM" sample="0">1</Item>\n <Item > name="STATISTICS_MEAN" sample="0">2</Item>\n <Item > name="STATISTICS_MINIMUM" sample="0">0</Item>\n <Item > name="STATISTICS_STDDEV" sample="0">3</Item>\n</GDALMetadata>\n\0> > > Even > > > Thanks. > .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ > Entre dos pensamientos racionales > hay infinitos pensamientos irracionales. > > > _______________________________________________ > gdal-dev mailing > [email protected]https://lists.osgeo.org/mailman/listinfo/gdal-dev > > -- http://www.spatialys.com > My software is free, but my time generally not. > >
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