Atlas · Rwanda
/
Methodologies
METHODOLOGIES
Proximity to pressures
Distance bands from LAPSSET and villages.
Method
For each mangrove polygon a representative point is taken (ST_PointOnSurface). Distance to the union of the reference geometries is measured on the ellipsoid in kilometres and polygons are binned (≤2, 2–5, 5–10, 10–25, >25 km). Areas in each band are summed.
Limits. Straight-line distance, not travel time or hydrological connectivity. Only 52 villages are mapped, so village proximity is a lower bound.
Related reading
More in Methodologies
- Provenance, checksums and the archive
- Field plots versus the map
- How Global Mangrove Watch maps are made
- Versions and cumulative updates
- The official yearly series (1985–2025)
- Spatial statistics: Moran's I and Getis-Ord Gi*
- How features are assigned to countries
- How recommendations and briefs are generated
Still have a question?
The AI analyst answers from these articles and from the data.
Ask Atlas