A geographic information system (GIS) is a conceptualized framework that provides the ability to capture and
analyze spatial and geographic data. GIS applications (or GIS apps) are computer-based tools that allow the
user to create interactive queries (user-created searches), store and edit spatial and non-spatial data,
analyze spatial information output, and visually share the results of these operations by presenting them as
maps.
Google Earth Enterprise - Open Source
Mapnik is an open source toolkit for developing mapping applications
3D Maps & Terrain SDK / C++17
Fast map matching, an open source framework in C++
An extensible 3D GIS application for visualization, analysis and research.
Mergin Maps mobile app 📲 Open QGIS projects and manage vector data on your phone, even offline 📶 (Android/iOS/Windows app)
Remote Sensing and GIS Software Library; python module tools for processing spatial data.
Public Domain library for rectifying Chinese coordinates
3D Terrain Renderer (C++17)
Cesium client for VSG
TerraMA² - a free and open source computational platform for early warning systems
Reconstruction of LoD2 3D city models for urban flow simulations