Atlas · Gabon / 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
4,864.7 ha
Largest patch 6.3% of area

Largest-size outliers

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

FormationArea (ha)zLocation
Mangrove12,187.36.360.5049, 9.5569
Mangrove10,813.06.290.0753, 9.8065
Mangrove8,690.66.160.6169, 9.6184
Mangrove8,332.06.13-0.8344, 8.8956
Mangrove8,162.76.12-0.8266, 8.9603
Mangrove7,636.86.08-0.8172, 9.0377
Mangrove7,211.86.050.0662, 9.7586
Mangrove7,061.76.030.2251, 9.3723
Mangrove6,233.55.960.5916, 9.5269
Mangrove5,421.65.880.0831, 9.9190

Most irregular outlines

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

FormationArea (ha)Shape idxLocation
Mangrove7,636.8424.7-0.8172, 9.0377
Mangrove8,331.9917.5-0.8344, 8.8956
Mangrove2,586.3316.4-1.3496, 9.1372
Mangrove4,587.2615.6-0.7455, 9.0375
Mangrove8,162.6715.4-0.8266, 8.9603
Mangrove8,690.5714.70.6169, 9.6184
Mangrove5,058.0413.40.1090, 9.5554
Mangrove6,233.5113.40.5916, 9.5269
Mangrove1,844.2113.40.5140, 9.4465
Mangrove12,187.2913.30.5049, 9.5569
Mangrove3,031.9912.3-1.3130, 9.0688
Mangrove7,061.7411.70.2251, 9.3723
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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