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QGIS — Mapping & Spatial Analysis

TypeFree, open-source Geographic Information System (GIS)
CostFree
Accessqgis.org
PlatformsWindows, macOS, Linux
Best forMapping cycling routes, analysing spatial data, creating figure-ground maps

What It Does​

QGIS is a professional-grade GIS tool — the free alternative to Esri's ArcGIS. Use it to create maps showing cycling networks, accident hotspots, land-use patterns, population density, and public space distribution across your city.

What You Can Do with QGIS​

For Cycling Advocacy​

  • Map cycling accident hotspots — overlay police data on a city map to show where cyclists are most at risk
  • Identify gaps in the cycling network — map existing bike lanes and highlight missing connections
  • Population and demand analysis — show where cyclists live vs. where infrastructure exists
  • Before-and-after comparisons — map changes over time to show impact of new infrastructure

For Public Space Analysis​

  • Figure-ground maps — show the ratio of built space to open space in a neighbourhood
  • Walkability analysis — map walking distances to parks, markets, and transit stops
  • Green space distribution — identify neighbourhoods underserved by parks and public spaces
  • Land-use mapping — visualise how much city land goes to roads vs. public spaces vs. parking

Getting Started​

  1. Download from qgis.org
  2. Import OpenStreetMap data for your city (free)
  3. Add layers — roads, buildings, parks, cycling infrastructure
  4. Start analysing and creating maps

Why This Matters for She Cycles​

Data wins arguments. A map showing that 70% of road space goes to cars while 2% goes to cycling is more powerful than any speech. QGIS lets you create that map for your city.

See Also​