Zhenyu, Even says that HFA driver supports overview creation. Try the gdaladdo utility like he said. http://www.gdal.org/gdaladdo.html
On Thu, Nov 11, 2010 at 8:45 PM, Zhenyu Lu <luzhenyu1...@gmail.com> wrote: > Hi, Chaitanya: > > Thanks for the answers! > It's really helpful. So suppose there is .img file, it has overviews been > created using other software. We can use it anyway? > Like we can directly use band=band.GetOverview(overview), even the syntax > that dataset.BuildOverviews doesn't work? > > > > 2010/11/11 Chaitanya kumar CH <chaitanya...@gmail.com> > > Zhenyu, >> >> GDAL's HFA driver doesn't support creation of overviews. It can only read >> them. >> >> On Thu, Nov 11, 2010 at 9:16 AM, Zhenyu Lu <luzhenyu1...@gmail.com>wrote: >> >>> >>> Hi, all: >>> I'm having an error while using function Dataset.BuildOverviews in my >>> code. >>> The error message is "BuildOverviews() not supported for this dataset". >>> However, when I used the ".tif" file the BuildOverviews worked just fine. >>> The >>> code is: >>> int[] pOverviewList = { overView*2}; >>> int[] pBandList = new int[dataset.RasterCount]; >>> int err = dataset.BuildOverviews("NEAREST", pOverviewList); >>> if (err != (int)CPLErr.CE_None) >>> return null; >>> I'm using GDAL1.5.2 and C#2.0. Is it because the HFA driver doesn't >>> support >>> overview? Or is it a bug? Can anyone pointed out where is my problem? >>> Thanks a >>> lot! >>> -- >>> Zhenyu Lu >>> SUNY-ESF >>> >>> >>> _______________________________________________ >>> gdal-dev mailing list >>> gdal-dev@lists.osgeo.org >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>> >> >> >> >> -- >> Best regards, >> Chaitanya kumar CH. >> /tʃaɪθənjə/ /kʊmɑr/ >> +91-9494447584 >> 17.2416N 80.1426E >> > > > > -- > Zhenyu Lu > SUNY-ESF > > -- Best regards, Chaitanya kumar CH. /tʃaɪθənjə/ /kʊmɑr/ +91-9494447584 17.2416N 80.1426E
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