NetCDF

• ​http://www.gdal.org/frmt_netcdf.html - format docs.

Building NetCDF

NetCDF support requires the ​NetCDF library. Once it is built and installed, use the "--with-netcdf=<path to install tree>" (e.g. /usr/local) option to configure and build GDAL. If nc-config is found in the default path or in the <path to install tree>/bin directory, then optional support of netcdf-4 will be tested.

See ​NetCDF Quick Instructions for instructions on how to build NetCDF.

./configure CC=gcc FC=gfortran F90=gfortran F77=gfortran CPPFLAGS=-DpgiFortran --with-pic

--with-pic is mandatory in 64 bit systems (GDAL compatibility)

make

make check

make install

Conflicts with HDF4

If building GDAL with both HDF4 and NetCDF support it is necessary to build the HDF library specially or a dangerous conflict will occur. See the HDF topic for details.

CygWIN

Please note that with CygWIN you need to be sure that the DLLs are executable, or GDAL will not execute. Use the command chmod a+rx [NetCDF DLLs] . The netCDF DLLs directory must be in your PATH.

Improvements to the NetCDF driver

The newer NetCDF-4 library offers features such as per-variable compression (using the deflate algorithm) and chunking which require the HDF5 library. To enable this, "--enable-netcdf4" (and perhaps --with-hdf5=<path_to_hdf5>) must be added to netcdf configure.

GDAL 1.9 includes support for NetCDF-4 file format (provided that nc-config is found in the configure stage), as well as the 64-bit offset file format. HDF4 and HDF5 files are also supported, although the respective driver is used if available. The syntax "NETCDF:<file>" forces the use of the NetCDF driver.

Please look into NetCDF_Improvements for information regarding these and other improvements to the GDAL NetCDF driver.

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