[gdal-dev] RPC transform

[Frank Warmerdam]

On Wed, Jan 16, 2013 at 1:49 PM, Frank Warmerdam <warmerdam at pobox.com> wrote:
> Folks,
>
> As I often seem to do, I exactly stated my point.  I meant write:

Garr, once again missing a keyword.

I meant to say "I exactly stated my point *wrong*."

> "On the other hand, I am *not* denying the possibility that the RPC
> DEM  interpolation is always off by half a pixel in all cases."
>
> Sorry for that.
>
>
> On Wed, Jan 16, 2013 at 1:35 PM, Ivan Lucena
> <ivan.lucena at princeton-ma.us> wrote:
>> Hi Frank,
>>
>>>  On the other hand, I am denying the possibility that the RPC DEM
>>>  interpolation is always off by half a pixel.  I haven't actually
>>>  looked closely at that code lately and the RPC code is not so very well
>>>  tested and validated.
>>
>> That is exactly what I understood from Yehiyam on  his first message. We all believe that GDAL transformation knows the input dataset pixel reference; and knows the GCPs pixel reference. What we are not sure, is if it is doing the right thing when reading from the auxiliary DEM dataset in terms of pixel reference.
>>
>> Regards,
>>
>> Ivan
>
>
>
> --
> ---------------------------------------+--------------------------------------
> 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