I'm working programmatically. I sort of understand the mechanism described in
the suggested document but would greatly appreciate a short snippet to show how
one goes about opening the subdataset. I'm guessing in the example described on
the web page that to open the first dataset I would call GDALOpen as follows:
GDALOpen("NITF_IM:0:multi_1b.ntf", GDALAccess::GA_ReadOnly);
Christiaan
-----Original Message-----
From: Frank Warmerdam [mailto:[EMAIL PROTECTED]
Sent: Friday, July 25, 2008 3:52 PM
To: Christiaan Janssen
Cc: [email protected]
Subject: Re: [gdal-dev] CADRG subdataset access help
Christiaan Janssen wrote:
> How exactly does one go about accessing the raster data in an format
> that contains subdatasets like CADRG? Any help would be greatly appreciated.
>
Christiaan,
Are you working programmatically or as a user with end-user tools like gdalinfo
and gdal_translate?
For an end user, one would normally run gdalinfo against the file/dataset and
see the reported subdataset names. Then run gdalinfo or gdal_translate against
the desired subdataset name.
Scripts/applications operate similarly, fetching the subdataset names from
metadata.
You may find it helpful to read the section titled "SUBDATASETS Domain" in this
doc:
http://www.gdal.org/gdal_datamodel.html
Best regards,
--
---------------------------------------+--------------------------------
---------------------------------------+------
I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org
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