Atlas · Eritrea / Signals & Anomalies
INTELLIGENCE

Signals & anomalies

Statistical checks that flag polygons and patterns that look unusual. They are prompts for review, not errors: an unusual polygon can be a real feature.

Polygons < 0.01 ha
0
0.0% of all polygons
Polygons < 0.001 ha
0
Likely slivers (≈ 10 m²)
Geometries repaired
55,235
Invalid shapes fixed on import
Effective mesh size
106.6 ha
Largest patch 4.2% of area

Largest-size outliers

z-score of ln(area): how many standard deviations above typical

FormationArea (ha)zLocation
Mangrove305.93.3614.7573, 40.7354
Mangrove279.73.3112.9683, 42.8476
Mangrove253.73.2615.7034, 40.1791
Mangrove251.93.2514.9584, 40.5159
Mangrove221.93.1915.6574, 40.2948
Mangrove213.23.1714.8918, 40.7071
Mangrove197.83.1313.0295, 42.8534
Mangrove170.93.0514.9026, 40.6766
Mangrove157.83.0114.8856, 40.6524
Mangrove149.72.9816.6269, 39.1469

Most irregular outlines

Shape index (perimeter ÷ circle perimeter): high values suggest jagged or sliver-like edges

FormationArea (ha)Shape idxLocation
Mangrove99.556.112.9241, 42.9157
Mangrove253.655.615.7034, 40.1791
Mangrove251.945.214.9584, 40.5159
Mangrove82.294.914.9457, 40.6180
Mangrove38.174.915.1447, 40.0852
Mangrove121.904.716.5123, 39.1606
Mangrove84.264.615.1998, 40.0877
Mangrove279.694.612.9683, 42.8476
Mangrove305.904.514.7573, 40.7354
Mangrove63.854.515.6183, 40.3748
Mangrove120.134.412.9150, 42.9341
Mangrove38.454.312.9120, 42.9147
How to use this page. Check flagged polygons against recent satellite imagery. Remove genuine mapping artefacts in the next source update; keep real features. Atlas never edits the source data silently.
Guest preview · 177s left Explore until the timer ends. Then you’ll be asked to log in or create an account (about two minutes) to keep going.
Ask Atlas