Atlas · Guinea / 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
2,354.7 ha
Largest patch 3.7% of area

Largest-size outliers

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

FormationArea (ha)zLocation
Mangrove8,278.55.589.8325, -13.6036
Mangrove7,088.65.509.7851, -13.6823
Mangrove5,353.15.359.2389, -13.2811
Mangrove5,438.25.3510.5267, -14.5849
Mangrove5,260.85.349.5800, -13.5542
Mangrove5,172.95.3310.8910, -14.8040
Mangrove5,031.05.3110.5375, -14.5412
Mangrove4,770.95.289.2273, -13.2164
Mangrove4,550.35.2610.7700, -14.6570
Mangrove4,069.75.2010.8045, -14.6669

Most irregular outlines

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

FormationArea (ha)Shape idxLocation
Mangrove5,172.9315.810.8910, -14.8040
Mangrove5,030.9714.910.5375, -14.5412
Mangrove5,438.1914.810.5267, -14.5849
Mangrove4,770.9413.69.2273, -13.2164
Mangrove5,260.7812.99.5800, -13.5542
Mangrove8,278.4812.29.8325, -13.6036
Mangrove7,088.6412.09.7851, -13.6823
Mangrove748.0211.69.8632, -13.8345
Mangrove1,278.7411.49.1481, -13.1112
Mangrove979.9210.79.2206, -13.1021
Mangrove3,053.9810.59.5240, -13.4580
Mangrove4,069.6710.110.8045, -14.6669
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.
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