[Gdal-dev] GMT & GDAL Geotiff grid registration

jluis jluis at ualg.pt
Fri Nov 18 15:37:29 EST 2005


Frank Warmerdam wrote:
> On 11/18/05, Rich Signell <rsignell at usgs.gov> wrote:
> 
>>In case this is really a missing feature, the PIXEL vs. LINE
>>registration of a GMT file is really easy to check.  You just read
>>the "node_offset" attribute of the grid variable.
>>
>>If node_offset=0, it's LINE
>>If node_offset=1, it's PIXEL
> 
> 
> Rich,
> 
> You are suggesting the node_offset on the "z"
> variable should be examined to determine if the x and
> y locations are relative to the top left corner of the pixel or
> the center?  Why the terminology of "LINE" vs. "PIXEL"?
> 
> If you can provide the file in question, I'll see what I can do.
> 

Frank,
I (re)mentioned this issue 3 days ago. Please revisit bug 796 in Bugzilla
(which is still open)


J. Luis



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