Hi, Even: Thanks for the information. I double checked the GDAL-1.5.2 compiled .net dll. But I can't find the function named as gdaladdo. What I can only find is three BuildOverviews function. So I am confused whether there is such a function in GDAL-1.5.2. I will try to test with GDAL-1.6 to see whether I can access such function. Thanks,
2010/11/11 Even Rouault <[email protected]> > Actually, the HFA driver *does* support overviews. It isn't obvious why it > does not work for you. Perhaps you should consider upgrading to a newer > GDAL > version, but I don't think this is an issue with GDAL 1.5.2. Does gdaladdo > work on the dataset ? If so, then it must be rather related to something > wrong > in your code. The "int[] pOverviewList = { overView*2}" is a bit strange, > but > it is difficult to know without more context. > > Le jeudi 11 novembre 2010 08:00:15, Chaitanya kumar CH a écrit : > > 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 <[email protected]> > 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 > > > [email protected] > > > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Zhenyu Lu SUNY-ESF
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