QGIS

QGIS is an open‑source geographic information system that lets users create, edit, and analyze spatial data across desktop, mobile, cloud, and print media. It offers a full suite of cartographic design tools, an intuitive layout designer for large‑format printing, and reporting features such as atlases that combine maps with tabular content.

The platform supports precise digitizing of points, lines, polygons, and meshes, with advanced construction tools for curves, CAD‑like operations, and geometry transformations. Users can build custom forms through a visual form designer and connect to a wide range of data sources and formats, including web services that follow industry standards.

QGIS includes a comprehensive toolbox for spatial analysis and automated workflows, and it can be extended with third‑party plugins. The software is maintained by a global community, released under the GNU GPLv2+ license, and is available for Windows, macOS, and Linux.