qgis / QGIS

QGIS is a full-featured, user-friendly, free-and-open-source (FOSS) geographical information system (GIS) that runs on Unix platforms, Windows, and MacOS.
- Features
 - 1. Flexible and powerful spatial data management
 - 2. Beautiful cartography
 - 3. Advanced and robust geospatial analysis
 - 4. Powerful customization and extensibility
 - 5. QGIS Server
- Under the hood
 - Versions and release cycle
 - Free and Open Source
- Installing and using QGIS
 - Documentation
 - Help and support channels
- Get involved with the community
## Features
### 1. Flexible and powerful spatial data management
- Support for raster, vector, mesh, and point cloud data in a range of industry-standard formats
 - *Raster formats include*: GeoPackage, GeoTIFF, GRASS, ArcInfo binary and ASCII grids, ERDAS Imagine SDTS, WMS, WCS, PostgreSQL/PostGIS, and other GDAL supported formats.
 - *Vector formats include*: GeoPackage, ESRI shapefiles, GRASS, SpatiaLite, PostgreSQL/PostGIS, MSSQL, Oracle, WFS, Vector Tiles and other OGR supported formats.
 - *Mesh formats include*: NetCDF, GRIB, 2DM, and other MDAL supported formats.
 - *Point-cloud format*: LAS/LAZ and EPT datasets.
- Data abstraction framework, with local files, spatial databases (PostGIS, SpatiaLite, SQL Server, Oracle, SAP HANA), and web services (WMS, WCS, WFS, ArcGIS REST) all accessed through a unified data model and browser interface, and as flexible layers in user-created projects
- Spatial data creation via visual and numerical digitizing and editing, as well as georeferencing of raster and vector data
- On-the-fly reprojection between coordinate reference systems (CRS)
- Nominatim (OpenStreetMap) geocoder access
- Temporal support
*Example: Temporal animation*
*Example: 3D map view*
### 2. Beautiful cartography
- Large variety of rendering options in 2D and 3D
- Fine control over symbology, labeling, legends and additional graphical elements for beautifully rendered maps
- Respect for embedded styling in many spatial data sources (e.g. KML and TAB files, Mapbox-GL styled vector tiles)
- In particular, near-complete replication (and significant extension) of symbology options that are available in proprietary software by ESRI
- Advanced styling using data-defined overrides, blending modes, and draw effects
- 500+ built-in color ramps (cpt-city, ColorBrewer, etc.)
- Create and update maps with specified scale, extent, style, and decorations via saved layouts
- Generate multiple maps (and reports) automatically using QGIS Atlas and QGIS Reports
- Display and export elevation profile plots with flexible symbology
- Flexible output direct to printer, or as image (raster), PDF, or SVG for further customization
- On-the-fly rendering enhancements using geometry generators (e.g. create and style new geometries from existing features)
- Preview modes for inclusive map making (e.g. monochrome, color blindness)
*Example: Map of Bogota, Colombia in the style of Starry Starry Night, by Andrés Felipe Lancheros Sánchez*