SAGA (System for Automated Geoscientific Analyses) GIS (Geographic Information System) is an open source, cross-platform and free graphical and command-line software that has been designed for an effective and easy implementation of spatial algorithms.
Features at a glance
The project boasts an object-oriented system design, provides a comprehensive and growing collection of geoscientific methods, a modular structure that allows you to develop framework-independent functions, as well as a convenient and easy-to-use GUI (Graphical User Interface) that features intuitive data management support and numerous visualization and analysis options.
Among other features, we can mention support for over 450 functions for geographical data analysis, support for terrain analysis, scripting via command-line supporting the Java, Python and R programming languages, cartographic and georeferencing projections, geographical statistics, image analysis, vector tools, a powerful API that offers great support for geodata handling.
In addition, the software comes pre-loaded with several vector tools, including buffer zones, raster to vector conversion and clipping, numerous terrain analysis tools like classification, morphometry, illumination and hydrology, a wide range of image analysis tools, such as OBIA (Object Based Image Analysis), FFT (Fast Fourier Transform), PCA (Principal Component Analysis), supervised classification and filters.
Several geostatistics functions are also provided, such as universal and ordinary Kriging, GWR (Geographically Weighted Regression) and variograms, as well as grid interpolation of scattered point data, splines, triangulation and IDW (Inverse Distance Weighted).
Under the hood and supported OSes
The software is written entirely in the C++ programming language and uses the wxWidgets framework for the graphical user interface (GUI). It has been designed from the offset as a cross-platform software that supports the GNU/Linux, FreeBSD and Microsoft Windows operating systems. Both 64-bit and 32-bit hardware platform are supported at this time. It is available for download as a universal sources archive, as well as a pre-built binary package for all GNU/Linux OSes.