dear gradsusr,<br><br>I have a few hdf files (below) I would like to open with grads, but I am finding difficulty using the xdfopen function.<br><br>SEVIRI_latitude.raw<br>SEVIRI_longitude.raw<br>SEVIRI_readme.txt<br>mean_seviri_aer_oc_d3_tau550_Aug2005.hdf<br>
mean_seviri_aer_oc_d3_tau550_Dec2005.hdf<br>mean_seviri_aer_oc_d3_tau550_Jul2005.hdf<br>mean_seviri_aer_oc_d3_tau550_Jun2005.hdf<br>mean_seviri_aer_oc_d3_tau550_Nov2005.hdf<br>mean_seviri_aer_oc_d3_tau550_Oct2005.hdf<br>
mean_seviri_aer_oc_d3_tau550_Sep2005.hdf<br>
<br><br>I tried to construct a descriptor file but cannot figure out how to access the information for the coordinates:<br><br>DSET mean_seviri_aer_oc_d3_tau550_Aug2005.hdf<br>TITLE monthly average of the daily total aerosol optical depth at 550 nm derived from MSG/SEVIRI<br>
UNDEF 99999.0<br>XDEF dimension1 ? LINEAR ? ?<br>YDEF dimension2 ? LINEAR ? ?<br>TDEF dimension3 ? LINEAR ? ?<br>VARS 1<br>Aerosol_optical_depth=>aod 1 99 aerosol optical depth<br>ENDVARS<br><br>I don't even know if I am on the right track. Can someone help me get to an answer please? because I am not managing to follow the help on GrADS index.<br>
<br>I have also attached the text file with the remaining information<br><br>Regards,<br><br>James<br><br>