Am 02.01.2013 15:45, schrieb Even Rouault: > Selon Christian Rapp <[email protected]>: > >> Hello altogether and happy new year, >> >> >> I just started using the GDAL c++ interface. I want to create float32 >> based GEoTiffs. This works quite well but in ArcMap they don't look that >> good because Statistics are missing. >> >> So first of all I called GetStatistics() Method from a Standard >> GDALDataset. This had no effect, at least ArcMap stilled complained >> about missing statistics. Then I switched to GDALPamDataset and >> GDALPamRasterBand and tried the same method again. Using the exiftool >> from Phil Harvey I see the statistics were written in the GDALMetadata >> section Even Esri recognizes this. Ok even better but why don't I get >> this values in an external aux.xml file? >> Right now I just call GetStatistics() right before GDALClose(). >> >> I also had a look at code of the gdalinfo tool. Because gdalinfo -stat >> creates what I want. But I don't see anything what could help me. > If you want the statistics in a external .aux.xml file, open the dataset in > GA_ReadOnly mode, call GetStatistics() and GDALClose() it. That's what > gdalinfo > does
I see, thats a nice trick :) Thanks for the info! > > Ah, and no need to cast to GDALPamDataset/GDALPamRasterBand: just use > GetStatistics() on the band object returned by GetRasterBand(), as > GetStatistics() is a virtual method of GDALRasterBand(). And the GTiff driver > extends GDALPamRasterBand, so the GetStatistics() implementation used will be > the one of GDALPamRasterBand. You mean I don't need GDALPamDataset/GDALPamRasterBandar at all? So no need to cast the GDALDataset returned by GDALDriver::Create() to a GDALPamDataset. Ok great, less work. Great library, congratulations! Regards Christian Rapp > _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
