[gdal-dev] An error in building overviews for

[Even Rouault]

Zhenyu,

gdaladdo is not a function. It is a command line utility that you should find  
with the other GDAL utilities.

Le jeudi 11 novembre 2010 19:05:23, Zhenyu Lu a écrit :
> 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 <even.rouault at mines-paris.org>
> 
> > 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 <luzhenyu1981 at 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 at lists.osgeo.org
> > > > http://lists.osgeo.org/mailman/listinfo/gdal-dev