HDF _FillValue error

[Ramon Solano]

Hello all,

I am working with HDF-EOS files from the MODIS sensor (MOD13 product)
with no problems. However, there is an issue I'm not sure what is
causing it.

I'm using the GrADS feature "UNDEF" to specify the SDS attribute that
contains the actual fill value, and it works quite well except for all
SDS and attributes defined as 8-bit integer (HDF Data Type 20). The
GrADS message is as follows:

Warning: HDF Attribute "_FillValue" is not a numeric data type (20)
Warning: Could not retrieve undef attribute "_FillValue" -- using
-99999 instead

Is this a bug or some extra configuration is required?

Thanks for your feedback.

/Ramon
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Ramon Solano, Research Specialist
Terrestrial Biophysics and Remote Sensing Lab.
Dept. of Soil, Water and Environmental Sciences
The University of Arizona