[gdal-dev] Bug in of GDALRead.cs

[Frank Warmerdam]

Markus,

Ah, I see.  The up to date sample scripts can also be found at:

  http://svn.osgeo.org/gdal/trunk/gdal/swig/csharp/apps/

The examples in FWTools are likely very out of date.

Best regards,
Frank

On Wed, May 8, 2013 at 6:57 PM, markus.u.mueller
<markus.u.mueller at zoho.com>wrote:

> **
> Frank,
>
> that is what I am using (Tamas' SDK), perhaps my email was not clear
> enough. The example .cs files (and that is where I found the bug) though
> are only available via FWTools. Makes sense?
> This example files are not strictly part of the C#-bindings, but as they
> are the only documentation available I figured it makes sense to fix them.
>
>
> Cheers,
>
> Markus
>
>
>
> ---- On Wed, 08 May 2013 15:57:05 -0700 *Frank Warmerdam <
> warmerdam at pobox.com>* wrote ----
>
> Markus,
>
> The GDAL C# bindings in FWTools is pretty ancient at this point so
> reporting bugs against it is unlikely to result in improvements.  You might
> want to upgrade to the latest version - either building from source, or
> perhaps using Tamas' SDK (http://www.gisinternals.com/sdk/).
>
> Best regards,
> Frank
>
>
> On Wed, May 8, 2013 at 3:07 PM, markus.u.mueller <
> markus.u.mueller at zoho.com> wrote:
>
> **
> Dear listers,
>
> I  think I found a bug in GDALReadDirect.cs (part of FWTools). Is this the
> right place to record it? I will describe the problem anyway and would be
> willing to move it to another place if more appropriate.
>
> I want to read Arc/Info Binary Grids and convert them to other image
> formats using the C#-bindings of GDAL. I installed FWTools 2.4.7 and the
> current binaries (MSVC2010 (Win64) -stable) from
> http://vbkto.dyndns.org/sdk/. Then I started testing the example
> C#-programs that are part of FWTools, especially  GDALReadDirect.cs. When I
> use the demo dataset utm.tif, this all works fine.
>
> I then converted utm.tif to the Arc/Info Binary Grid format using ArcMap
> 10 (Conversion Tools - To Raster - Raster to other Format). When I try to
> use  GDALReadDirect.cs I get the following error messages:
>
>  Using driver Arc/Info Binary Grid Band 1 :    DataType: GDT_Int16    Size (512,512)    PaletteInterp: GCI_Undefined       OverView 0 :          DataType: GDT_Int16          Size (256,256)          PaletteInterp: GCI_GrayIndex       OverView 1 :          DataType: GDT_Int16          Size (128,128)          PaletteInterp: GCI_GrayIndex The number of the raster bands is not enough to run this sample
>
>  GDALReadDirect.cs obviously has an erroneous method named
> SaveBitMapDirect, that first checks on the available Color interpretation
> and then on the number of bands. After the file is converted to Arc/Info
> binary Grid format, the information about the Color interpretation is lost,
> so only then the program checks on the number of available bands and
> returns an error message. SaveBitMapDirect works for the described case
> if Line 157 is edited:
>
> if (redBand.GetRasterColorInterpretation() == ColorInterp.GCI_GrayIndex ||
> redBand.GetRasterColorInterpretation() == ColorInterp.GCI_Undefined)
>
> This is not a general fix, only for the immediate problem.
>
>
>
> Cheers,
>
>
> Markus
>
>
>
>
>
>
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
>
>
>
> --
>
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Software Developer
>
>
>


-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Software Developer
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20130509/13f3c896/attachment.html>