NCAR Command Language (NCL) is an interpreted language designed specifically
for scientific data processing and visualization. Portable, robust, and free,
NCL supports netCDF3/4, GRIB1/2, HDF-SDS, HDF4-EOS, binary, shapefiles, and
ASCII files. Numerous analysis functions are built-in. High quality graphics
are easily created and customized with hundreds of graphic resources. Many
example scripts and their corresponding graphics are available.