Hi,
Le 06/12/2010 20:50, Trent M Hare a écrit :
It would also make sense to
merge the PDS and ISIS2 code set however there are subtitle differences
in both formats that we must be careful of.
I have an existing code for this (only IMAGE tag), and in my patch i
have prepare two function to manage IMAGE tag and SPECTRAL_QUBE tag.
See Open() function in patch.
Before we can incorporate your changes into GDAL, I would like to see
projection export support implemented also. The main reason for these
readers was to help propagate the projection, so I would want to see
this working both directions. I will see where it stands and if I can
help.
I not use projection at this time but i'm looking for this.
I'm not sure how to implement "create_copy" so we might need help
from the GDAL team.
If i have the time i look this also...
Let me check out your patch and test some images. If all looks good we
ask the GDAL team to also help incorporate your patch. Also there is
another PDS fix that needs to be incorporated. Maybe you might have time
to see if it would be a quick fix since you have been working wit the
code recently (please see issue below). If you don't have time please
let me know.
> I am also curious how you managed to support ISIS2 side
planes? This capability was removed from ISIS3 due to lack of use and
complexity.
In my case for this time my algorithm not use backplane but image have
backplane or side-plane. Also the patch read qube data and remove
backplane information. But i think about this to integrate backplane
information :
two possibilities :
* write another file with information
* keep backplane information with metadata
I think if we can implement the two possibilities will be very interesting.
Thanks again for your willingness to share your improvements. Just out
of curiosity - what facility are you working with?
I'm not sure to if I understand correctly your question (i am not very
good in English sorry :( )
But i use gdal with the library OTB (http://www.orfeo-toolbox.org) to
create algorithms for working on hyperspectral data from spacecraft
(planetary mission) : OMEGA, CRISM, VIRTIS, etc.
Regards
Ludovic
Response to comment :
/i have a patch for gdal 1.7.3 to improve isis2 driver./
/* writing functionality for QUBE object //-/ again I would like to see
an attempt at supporting projections also - I will help.
See first part of this message
/* grab null value /- What does this mean as support for a single NULL
value was there? Does this address the fact that all ISIS2, PDS, and
ISIS3 can support multiple NULL values?
Multiple null value is a problem, i think about this : thread with Frank
with title "several No data value"
/* can read qube with back plane, side plane and bottom plane /- great
again sI will need to see how you supported side/bottom planes. Do you
make a new file?
See first part of this message
/* can read a file with label detached or attached. -/ I thought this
was already implemented? Maybe there were some fixes though./ /
Originally my patch worked with gdal 1.6.3 there were some problem with
this.
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