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How to read or extract modis HDF aerosol data .

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sunny kant
sunny kant 2014-11-9
评论： David Young 2014-11-14
Hi sir, i have written a code for read a modis hdf aerosol data. i did not read a data or see data in excel. will u check this code and tell me. i attach data set and code also.
% Open the HDF file and assign it a file ID.
modis_id=hdfsd('start','MOD08_M3.A2005001.051.2011046203433.hdf','read');
% Extract information about the file discription
[numdata, numdescr]= hdfsd('fileinfo', modis_id)
% Assigning dataset ID(S)
AODid = hdfsd ('select',modis_id,9) longid = hdfsd ('select',modis_id,0) latid=hdfsd('select', modis_id, 1)
% Extracting infomation from Dataset
[name,numdim,dimvector,type,numdescr]=hdfsd('getinfo',AODid)
[name,numdim,dimvector,type,numdescr]=hdfsd('getinfo',longid)
[name,numdim,dimvector,type,numdescr]=hdfsd('getinfo',latid)
% Reading HDF datasets and importing into MatLAB
startvector=[0 0];
endvector=dimvector;
stride=[];
AODvar=hdfsd('readdata',AODid,startvector,stride,endvector);
longvar=hdfsd('readdata',longid,startvector,stride,endvector);
latvar=hdfsd('readdata',latid,startvector,stride,endvector);
thanks sir
  1 个评论
David Young
David Young 2014-11-14
Please edit the first few lines of code to make them readable like the rest. (Put two spaces at the start of each line.)

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回答（3 个）

Hyo-Kyung Lee
Hyo-Kyung Lee 2014-11-14
Have you checked the following MODIS MATLAB example?
http://hdfeos.org/zoo/LAADS/MOD08_D3_Cloud_Fraction_Liquid.m
David Young
David Young 2014-11-14
I've been using hdfinfo with 'eos' as the second argument and hdfread to read MOD10 files.
If you try that and still can't read the data, please could you give more details of what is wrong.
Chad Greene
Chad Greene 2014-11-9
I believe hdfsd is obsolete. Consider h5read instead.
  1 个评论
Hyo-Kyung Lee
Hyo-Kyung Lee 2014-11-14
编辑：Hyo-Kyung Lee 2014-11-14
h5read is for HDF5 file. The MODIS file is HDF4 (HDF-EOS2) so h5read will not work.

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