Free satellite imagery and DEM analyses enabling NRM in the developing world
summary
Uses Sentinel-2 10 m every 5 days and Landsat archives (1996–2015) with free elevation data to detect land-use change and sediment pathways; runs analyses in SAGA GIS (700+ raster modules) and packages a SAGA toolchain for cost-distance modeling. Shows a mine declared closed still expanding on imagery, maps sediment flow that flags possible mercury contamination, and produces travel-time maps (>2 hours) that directly support a successful cost-distance-led hospital funding advocacy.
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chapters (9)
- 0:00Introduction and background
- 2:08Revolution in satellite data access
- 4:59Free open-source tools for analysis
- 6:03Monitoring mining activities
- 8:53Access to health services analysis
- 11:19Training and capacity building
- 13:03Empowering local communities
- 14:28Call to action for development programs
- 14:49Q&A session
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