hdfgd issue when reading MODIS mcd12c1 coordinates (or the way to get the coordinates of hdf-eos data)

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Rong Yu
Rong Yu 2015-6-11
回答： Rong Yu 2015-6-11
I used the code below to try to get the grid information of MODIS MCD12C1 data. The data format is hdf-eos. But grid_id always equals to -1. Does anyone know why or share another way with me to read the coordinates of hdf-eos data. Thank you!!!
FILE_NAME='MCD12C1.A2001001.051.2014274170618.hdf'
GRID_NAME='GeoGrid'
file_id = hdfgd('open', FILE_NAME, 'rdonly')
grid_id = hdfgd('attach', file_id, GRID_NAME)

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回答（1 个）

Rong Yu
Rong Yu 2015-6-11
Figured it out.
GRID_NAME should be the exact one from the metadata, which can be achieved by hdfinfo.
For example,
fileinfo = hdfinfo('MCD12C1.A2009001.051.2013164180520.hdf');
In fileinfo>attributes>'StructMetadata.0', there is GridName.

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