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This page provides Makefile templates and more C and Fortran 77 examples on how to read HDF-EOS5 grid data using the HDF-EOS5 library.
After you write a C program, you need to build the executable using a C compiler.
One easy way to build the executable is to use h5cc, part of
the HDF5
library.
We recommend that users create Makefile to build binaries from C sources.
The following shows a skeleton of Makefile that can be used to build
read_grid from read_grid.c.
CFLAGS and LDFLAGS set paths to the HDF-EOS5 library.
Users do not need to set paths to the HDF5 library here because h5cc
sets them automatically. LIBS specifies libraries used by the program.
Both he5_hdfeos and Gctp are from HDF-EOS5. Change read_grid to your own
exectuable name.
If users do not use h5cc, many switches may be required based on how the HDF5 library and the HDF-EOS5 library are built.
After creating your own Makefile, type make or gmake to generate
the executable program.
As h5cc is used in C, h5fc, which is part of
the HDF5 binary distribution, can be used to build a Fortran program.
The following is a skeleton of Makefile that can be used to build read_grid from
read_grid.f. We assumed GNU Fortran 77 compiler is available.
You may get linker errors regarding underscores. Probably, Fortran compilers provide
several options about underscores, and users need to adjust the option. For example,
we used -fno-underscoring option.
Note that h5fc is not created if the HDF5 library is built without Fortran.
Still, users can build Fortran programs because the Fortran interfaces of the HDF-EOS5 library does
not depend on HDF5's Fortran wrapper library.
The following is one possible Makefile that
builds read_grid from read_grid.f without using h5fc.
is available and the HDF5 library is built with the SZIP library.
If the HDF5 library is not built with the SZIP library, neither LDFLAGS nor LIBS needs to contain
the SZIP library path.
If you want to build your Fortran program with non-GNU compiler like Intel Fortran compiler or PGI Fortran compiler, do not specify any FFLAGS option in your make file. The following is an example Makefile for Intel Fortran compiler.
After creating your own Makefile, type make or gmake to generate
the executable program.
Download one file here. See C code or Fortran 77 code that reads the TerrainReflectivity data field from the ColumnAmountAerosol grid.
Download one file here. See C code or Fortran 77 code that reads the L3dmValue data field from the Temperature grid.
Download one file here. See C code or Fortran 77 code that reads the CH4AtSurface data field from the NadirGrid grid.