QGIS (formerly Quantum GIS) is a free geographic information system for viewing, editing and capturing spatial data.
QGIS is a geographic information system for viewing, editing and acquiring spatial data and is GNU General Public License. Main features of the application are the broad support of common vector data and raster data as shapefile or GeoTIFF, but also spatial databases such as PostGIS and SpatiaLite, mature digitizing tools for capturing vector data and a pressure compilation for easily creating map printouts.
The QGIS architecture relies heavily on extensions note are the fTools tools for general vector-based tasks or the GRASS extension for sophisticated spatial analysis. A GPS extension allows to read GPX files or directly access a GPS device. Other extensions allow including WMS and WFS services.
Major parts of the graphical user interface are translated into over 30 different languages.
The basis of QGIS and its extensions the platform-independent Qt library that develop applications with graphical user interfaces in the style of the host operating system allows ( QWindowsVistaStyle, QWindowsXPStyle, QMacStyle ).
QGIS offers a programming interface, which allows the use of existing QGIS functionality in your own programs or writing extensions for QGIS. Extensions can be developed in both C and Python ( PyQt ). The programming interface is divided into four modules:
- QGis.Core for basic functions such as data access, geometries or projections
- QGis.Gui User Interface Elements
- QGis.Analysis with classes for the analysis of vector and raster data
- MapComposer classes with the pressure compilation
Due to the relatively low memory requirements and the concomitant small claim to the hardware QGIS is also suitable for use on older hardware and can be run in parallel with other applications.
QGIS runs on Mac OS X, Linux, Unix, and Windows XP or higher. It is also available as an app for Android.
Developer and User Meeting
Since 2009 there will be multi-day developer meeting held under the name of QGIS Hackfest. These were carried out in Hannover, Vienna, Pisa, Wroclaw, Lisbon, Zurich, Lyon and food.
Since 2010, takes place annually a QGIS user meetings with lectures and workshops.