Hello,
I just wanted to check that I'm not doing something stupid here. I'm trying to
compare an SDS in two HDF-EOS files. Basically, I'm creating one file and
adding the new SDS (file_a.hdf) and comparing it to another file that I've
downloaded (file_b.hdf). Here's the command I'm using:
hdiff -d -b -v SDS_NAME file_a.hdf file_b.hdf
Due to the -b option above, for file_a.hdf, I see the following related to
SDS_NAME:
720 1198 mod04/Data Fields/SDS_NAME
And for file_b.hdf:
720 135 mod04/Data Fields/SDS_NAME
Then later:
x mod04/Data Fields/SDS_NAME
x mod04/Data Fields/SDS_NAME
And no comparison is performed on SDS_NAME. From the output, it seems that
hdiff is not recognizing that these two SDS are the same. They are at different
indexes (SDS_NAME is at index 72 in file_a.hdf and 53 in file_b.hdf). There are
some SDS's that are the same in the two files and can be compared. The
difference seems to be that ones that I add myself are not comparable. SDS_NAME
in file_a.hdf is the same type and size as SDS_NAME in file_b.hdf. There are
some differences in the attributes that I've attached to the SDS -- e.g.
long_name is slightly different. Also, SDS_NAME in file_b.hdf is compressed
while uncompressed in file_a.hdf.
Is this the expected behavior? Is there a way to work around this so that
hdiff will compare SDS_NAME in file_a.hdf and file_b.hdf? In general, what are
the criteria used to determine whether two SDS's are comparable within hdiff?
Thanks,
-Corey
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