Atlas · Ghana / 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
1,382.6 ha
Largest patch 37.5% of area

Largest-size outliers

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

FormationArea (ha)zLocation
Mangrove3,425.36.635.8226, 0.7475
Mangrove436.95.184.9252, -2.2153
Mangrove365.55.054.9627, -2.4281
Mangrove289.14.895.0389, -1.6124
Mangrove287.84.885.7840, 0.8130
Mangrove277.54.864.8387, -1.9019
Mangrove253.44.795.0263, -1.6280
Mangrove241.44.765.7897, 0.7044
Mangrove188.84.595.7975, 0.7173
Mangrove161.44.485.0287, -2.7689

Most irregular outlines

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

FormationArea (ha)Shape idxLocation
Mangrove3,425.3219.75.8226, 0.7475
Mangrove161.448.55.0287, -2.7689
Mangrove365.488.34.9627, -2.4281
Mangrove241.376.85.7897, 0.7044
Mangrove289.136.55.0389, -1.6124
Mangrove277.546.44.8387, -1.9019
Mangrove436.926.44.9252, -2.2153
Mangrove69.375.75.8180, 0.7127
Mangrove188.815.45.7975, 0.7173
Mangrove44.825.25.8686, 0.7095
Mangrove287.805.25.7840, 0.8130
Mangrove253.424.95.0263, -1.6280
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 · 178s 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