QGIS

QGIS, or Quantum GIS, is a free and open-source geographic information system (GIS) that allows users to create, edit, visualize, and analyze spatial data. It helps individuals and organizations work with maps and geographic information to understand patterns and relationships in their data. Users can combine various layers of information, such as roads, land use, or environmental data, and perform detailed analyses. QGIS is widely used in fields like urban planning, environmental science, and resource management, making complex geographic data accessible and useful for informed decision-making.