Hi, I have added draft 'doxygen' style documentation of the new SWIG interface in CVS (swig/index.dox). For a version in HTML, see here: http://mpa.itc.it/markus/grass61progman/swig/GRASS_SWIG_interface.html SWIG may help to use GRASS as GIS backbone in other applications, be local, be WebGIS. Markus