[gdal-dev] problem with ArcSDE raster (negative values)

[bartvde at osgis.nl]

Hi Ivan,

unfortunately that's not an option yet, since we use ArcSDE 9.1 which is
not compatible with GeoRaster. We need to wait until our 9.3.1 or 9.4
upgrade.

Best regards,
Bart

> bartvde at osgis.nl wrote:
>> Hi list,
>>
>> I've been trying to debug my problem which I originally posted on
>> mapserver-users here:
>>
>> http://lists.osgeo.org/pipermail/mapserver-users/2009-November/063706.html
>>
>> I've debugged the problem to the following part of
>> frmts/sde/sderasterband.cpp:
>>
>>     if (bits_per_pixel >= 8) {
>>         memcpy(pImage, pixels, block_size);
>>         GByte *p = reinterpret_cast<GByte*>(pImage);
>>     } else {
>>
>> The values in the pixels variable are still okay, and contain mostly
>> negative values as well as 0 (for example -42).
>>
>> The p variable only contains positive values and 0 values.
>>
>> Hopefully this will help somebody to pinpoint the problem, as I am not
>> familiar enough with C++ to solve this.
>>
>> TIA.
>>
>> Best regards,
>> Bart
>>
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>
> Bart,
>
> Since you are using Oracle 10g, have you tried to use the GDAL/GeoRaster
> driver instead of the
> GDAL/SDE?
>
> The GeoRaster driver uses the OCI library to read BLOB direct from the
> server, as long as the column
> data type is the ORACLE's SDO_GEORASTER, not the ESRI's ST_RASTER or
> Terralib's TE_RASTER or
> anything else...
>
> You would need to change your .MAP file, LAYER/DATA parameter according to
> the GeoRaster
> identification string [http://gdal.org/frmt_georaster.html].
>
> Regards,
>
> Ivan
>
>