[DebianGIS-dev] Bug#437098: hdf4 amd64 compatibility to 32-bit

[Ivan Shmakov]

>>>>> T Dinter <dinter at iup.physik.uni-bremen.de> writes:

 > Package: libhdf4g
 > Version: 4.1r4-21

 > Dear hdf4 maintainers, since i have an amd64 system, i have problems
 > with hdf4 files create by a 32-bit system (e.g. satellite data MODIS,
 > MISR ....). I sent you two little hdf files create on a standart
 > 32-bit and the amd64 system with example source (sd_rd.c) from hdf
 > web site. And if you look with a hexeditor into the files, you see
 > that the bytes of the dataset and dimensions are swapped. So I guess
 > this is a problem of compiler flags (-DBIG_LONGS -DSWAP).

	I could probably confirm that this bug is there as of
	4.1r4-18.1_amd64 (etch), e. g.:

amd64 $ ncdump-hdf -h MOD09GHK.A2004186.h20v09.005.2007045162226 
netcdf MOD09GHK.A2004186.h20v09.005.2007045162226 {
dimensions:
	YDim_MOD_Grid_L2g_2d = 1611202560 ;
	XDim_MOD_Grid_L2g_2d = 1611202560 ;
	Total_Additional_Observations = 1068902144 ;
	Data_Rows = 1611202560 ;

...
amd64 $ 

	While it should instead read:

i386 $ ncdump-hdf -h /tmp/MOD09GHK.A2004186.h20v09.005.2007045162226.hdf 
netcdf MOD09GHK.A2004186.h20v09.005.2007045162226 {
dimensions:
	YDim_MOD_Grid_L2g_2d = 2400 ;
	XDim_MOD_Grid_L2g_2d = 2400 ;
	Total_Additional_Observations = 2602559 ;
	Data_Rows = 2400 ;

...
i386 $ 

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