[gdal-dev] gdal 1.5.2's RADARSAT-2 driver

[Philippe Vachon]

Hi Shawn,

If you're using GDAL directly, and don't select a subdataset AND the
program you're writing ignores subdatasets, you can just read the
digital numbers without any other work. A hidden misfeature of the RS2
driver.

However, if you're using it with OpenEV or something, it might be
possible to just prepend RADARSAT_2_CALIB:UNCALIB: to the filename. This
will tell the RS2 driver to provide only uncalibrated DNs. However, no
guarantees this will work with OpenEV.

As far as the GeoTIFF error goes, I'll have to delegate that to someone
else -- I have heard reports that there are non-standard GeoTIFF tags in
the production RADARSAT-2 datasets, but I don't know if that's the cause
of the warning you're seeing or not.

Cheers,
Phil

On Fri, Sep 12, 2008 at 03:28:36PM -0400, Gong, Shawn (Contractor) wrote:
>    hi list,
> 
>     
> 
>    rephrase my 2nd question, is there a way to skip the "SubDataset
>    Selection" dialog, and to load uncalibrated digital numbers by default?
> 
>     
> 
>    thanks,
>    Shawn 
> 
>     
> 
>    --------------------------------------------------------------------------
> 
>    From: gdal-dev-bounces at lists.osgeo.org
>    [mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Gong, Shawn
>    (Contractor)
>    Sent: Friday, September 12, 2008 2:28 PM
>    To: gdal-dev at lists.osgeo.org
>    Subject: [gdal-dev] gdal 1.5.2's RADARSAT-2 driver
> 
>     
> 
>    hi list,
> 
>    I have installed gdal 1.5.2 on Windows, trying to test the RADARSAT-2
>    driver.
> 
>    When loading RSAT-2 "product.xml", a "SubDataset Selection" dialog box
>    pops up and asks user to select 1) uncalibrated digital numbers, 2) Sigma
>    nought calibrated, 3) beta nought calibrated, 4) gamma calibrated.
> 
>    After selection, I got the error:
> 
>    Warning 1: TIFFReadDirectory:Unknown field with tag 34595 (0x8723)
>    encountered
> 
>    and the "SubDataset Selection" dialog box reappears.
> 
>    2nd question, is there a way to capture which subDataset that user has
>    selected? i.e., did he select 1) uncalibrated digital numbers, 2) Sigma
>    nought calibrated, 3) beta nought calibrated, or 4) gamma calibrated or
>    all of them?
> 
>    thanks,
> 
>    Shawn
> 
>     

> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev