Python module for reading and writing GRIB edition 2 files.
GRIB is the World Meteorological Organization (WMO) standard file format for the exchange of weather data.
Uses C code from NCEP's g2clib (http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2).
Requires
1) Python 2.3 or higher.
2) numpy: N-dimensional array object for python (http://numpy.scipy.org). Version 1.2.1 or newer recommended.
3) pyproj: python interface to PROJ.4 library (http://code.google.com/p/pyproj).
4) jasper lib: This library is a C implementation of the JPEG-2000 Part-1 standard (i.e., ISO/IEC 15444-1). Download from the JasPer Project's home page, http://www.ece.uvic.ca/~mdadams/jasper/. Needed to work with GRIB2 files that use JPEG2000 compression.
4) png lib: This library is a C implementation of the Portable Network Graphics PNG image compression format. It's probably already on your system. If not, download from http://www.libpng.org/pub/png/libpng.html. Needed to work with GRIB2 files that use PNG compression.
5) zlib: This library contains compression/decompression routines used by libpng for PNG image compression support. It's probably already on your system. If not, download from http://www.gzip.org/zlib/. Needed to work with GRIB2 files that use PNG compression.
Installation
1) set the environment variables JASPER_DIR, PNG_DIR, ZLIB_DIR to point to the directories where jasper, png and zlib are installed. For example, the jasper libs should be found in $JASPER_DIR/lib, and the include files in $JASPER_DIR/include. Windows users will need either cygwin (www.cygwin.com) or mingw (www.mingw.org).
2) Run 'python setup.py install', as root if necessary.
Usage
See documentation in the 'doc/html' directory, and try the test scripts in the 'examples' directory. Sample GRIB2 files are in the sampledata directory.
NCEP GRIB Edition 2 files are available at: ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/
Feedback to Jeff Whitaker jeffrey.s.whitaker@noaa.gov
Copyright
the source code from g2clib (http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2) is include in the 'g2clib_src' directory and is in the public domain.
Everything else:
copyright (c) 2007 by Jeffrey Whitaker.
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Links
http://code.google.com/p/pygrib2 http://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/ http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2 http://www.ecmwf.int/products/data/software/grib2.html http://weather.gov/mdl/iwt/grib2/decoder.htm http://www.nws.noaa.gov/datamgmt/doc/GRIB2_encoding.html http://proj.maptools.org http://tigge.ucar.edu