Atlas · Cameroon / 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
7,761.8 ha
Largest patch 13.2% of area

Largest-size outliers

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

FormationArea (ha)zLocation
Mangrove27,996.37.124.5194, 8.8938
Mangrove9,568.36.473.9061, 9.7013
Mangrove9,480.36.464.6188, 8.7451
Mangrove9,323.46.454.7153, 8.7724
Mangrove8,133.46.374.0699, 9.5226
Mangrove7,384.86.313.7094, 9.7075
Mangrove6,920.66.273.9675, 9.6703
Mangrove6,585.76.244.5997, 8.8133
Mangrove5,944.26.184.5825, 8.6273
Mangrove5,839.66.174.5146, 8.7034

Most irregular outlines

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

FormationArea (ha)Shape idxLocation
Mangrove8,133.4327.04.0699, 9.5226
Mangrove27,996.2824.84.5194, 8.8938
Mangrove7,384.8015.63.7094, 9.7075
Mangrove1,217.1415.24.7476, 8.8352
Mangrove453.9912.04.7102, 8.9126
Mangrove520.3811.74.7994, 8.8014
Mangrove652.0411.54.8861, 8.6091
Mangrove9,568.2711.03.9061, 9.7013
Mangrove4,929.8410.73.8161, 9.8312
Mangrove5,161.729.23.6865, 9.6778
Mangrove203.269.24.8420, 8.6323
Mangrove113.348.74.5679, 8.9884
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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