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
| Formation | Area (ha) | z | Location |
|---|---|---|---|
| Mangrove | 8,278.5 | 5.58 | 9.8325, -13.6036 |
| Mangrove | 7,088.6 | 5.50 | 9.7851, -13.6823 |
| Mangrove | 5,353.1 | 5.35 | 9.2389, -13.2811 |
| Mangrove | 5,438.2 | 5.35 | 10.5267, -14.5849 |
| Mangrove | 5,260.8 | 5.34 | 9.5800, -13.5542 |
| Mangrove | 5,172.9 | 5.33 | 10.8910, -14.8040 |
| Mangrove | 5,031.0 | 5.31 | 10.5375, -14.5412 |
| Mangrove | 4,770.9 | 5.28 | 9.2273, -13.2164 |
| Mangrove | 4,550.3 | 5.26 | 10.7700, -14.6570 |
| Mangrove | 4,069.7 | 5.20 | 10.8045, -14.6669 |
Most irregular outlines
Shape index (perimeter ÷ circle perimeter): high values suggest jagged or sliver-like edges
| Formation | Area (ha) | Shape idx | Location |
|---|---|---|---|
| Mangrove | 5,172.93 | 15.8 | 10.8910, -14.8040 |
| Mangrove | 5,030.97 | 14.9 | 10.5375, -14.5412 |
| Mangrove | 5,438.19 | 14.8 | 10.5267, -14.5849 |
| Mangrove | 4,770.94 | 13.6 | 9.2273, -13.2164 |
| Mangrove | 5,260.78 | 12.9 | 9.5800, -13.5542 |
| Mangrove | 8,278.48 | 12.2 | 9.8325, -13.6036 |
| Mangrove | 7,088.64 | 12.0 | 9.7851, -13.6823 |
| Mangrove | 748.02 | 11.6 | 9.8632, -13.8345 |
| Mangrove | 1,278.74 | 11.4 | 9.1481, -13.1112 |
| Mangrove | 979.92 | 10.7 | 9.2206, -13.1021 |
| Mangrove | 3,053.98 | 10.5 | 9.5240, -13.4580 |
| Mangrove | 4,069.67 | 10.1 | 10.8045, -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.