Daniele Romagnoli a écrit :
> My data is packed data (I have SampleValidRange, and scale/Offset values
> to obtain the geophysic data).
Yes, but I would expect your packed data to be integer values, are they?
If they are integer, a validMin = 1 would be appropriate for those particular
data (it is the minimal packed value, not the minimal geophysics value).
> (I have a different product having as validRange, -3.4028235E38,
> 3.4028235E38, then, I cannot use a validMin set to 1).
This is an other beast. Those data are probably already geophysics (i.e.
scale=1
and offset=0) except that they have "nodata" values that are not NaN. This is a
different case than the previous one. This case live in a "gray area" - they
are
not packed, but not completly geophysics neither because of the "nodata" values
that are not NaN. There is no direct support by GridCoverage2D for this gray
area at this time. I'm used to handle those data by replacing the "nodata"
values by NaN straight at reading time (inside ImageReader code). The result is
a "pure geophysics" image, which GridCoverage2D can handle.
Martin
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