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HDF_SD_GETACCESS: No content in variable, error [message #71808]

Wed, 21 July 2010 04:17

aa8533
Messages: 8
Registered: July 2010

Junior Member

Hi - I'm trying to make a program which automatically runs through
100s of images (MODIS Fire data) and extracts data at a particular
point. The program works fine where there is data to extract (in the
case below, when there is data in FP_Sample) but halts for an image
where there is none with message "Array dimensions must be greater
than 0".

Extract of code is:

sd=hdf_sd_start(fileName)
index=hdf_sd_nametoindex(sd,'FP_sample')
sds=hdf_sd_select(sd,index)
hdf_sd_getdata,sds,sample <------------------ Halts with message
here

Is there a way to test the size of the variable (in this case Sample)
and if, say it's -1 (no data) then skip the last line of this code?

Would very much appreciate any help.

Matt

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