gvSIG

gvSIG is a free and open-source geographic information system (GIS) project and desktop application for viewing, editing, analyzing, and presenting geospatial information. It originated in Valencia, Spain, in 2004 through collaboration among public administrations, universities, and software vendors and is maintained by the gvSIG Association. The project is released under the GNU General Public License and is developed as a multi-platform Java application.

gvSIG Desktop runs on Windows, macOS, and Linux. Its architecture is modular and plugin-based, allowing users and developers to extend its functionality. Core capabilities include map visualization in 2D and, in newer releases, 3D visualization; editing of vector features; topology checks; and geoprocessing tools for common operations such as buffering, intersection, and overlay. The software provides cartographic tools for map composition and printing and can connect to a variety of data sources.

In terms of interoperability, gvSIG supports common vector formats such as Shapefile and GeoJSON and raster formats such as GeoTIFF, along with spatial databases including PostGIS and SpatiaLite. It can access data via local files, databases, and interoperable web services following OGC standards (for example, WMS and WFS). The application also supports multiple coordinate reference systems and on-the-fly projection.

gvSIG is part of a broader ecosystem that includes gvSIG Desktop, gvSIG Mobile, and gvSIG Online solutions. Governance and development are coordinated by the gvSIG Association, a non-profit organization that promotes GIS research, education, and collaboration. The software is used by public administrations, universities, and private organizations worldwide, with strong presence in Spanish-speaking regions.