CHANGES current GRASS GIS 7.x compared to previous GRASS GIS 7.x See list of releases with changelog at https://trac.osgeo.org/grass/wiki/Release CHANGES in GRASS GIS 7.0 compared to GRASS GIS 6.x The graphical user interface based on wxPython (introduced in GRASS GIS 6.4) has been enriched with many new features in order to make complex GIS operations available as simple as possible. The old Tcl/Tk based GUI has been dropped. Relevant new features are available in the core system, among the most important the new Python interface to the C library. This new feature permits Python developers to create new modules in a simple way while at the same time creating powerful and fast modules. Furthermore, the vector library was particularly improved to make it faster and more efficient with support of huge files. This required a easy to manage topology format update including a new spatial index. Finally, there are a series of new modules to analyse raster and vector data; some of the already existing modules were improved and made faster (some even 1000 x faster). In total, more than 10,000 changes have been implemented in GRASS GIS 7.0.0 with respect to GRASS GIS 6.4.x For details, please refer to this Web page: http://trac.osgeo.org/grass/wiki/Grass7/NewFeatures