Atlas · Senegal
/
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
2,138.0 ha
Largest patch 4.5% of area
Largest-size outliers
z-score of ln(area): how many standard deviations above typical
| Formation | Area (ha) | z | Location |
|---|---|---|---|
| Mangrove | 6,776.4 | 5.95 | 13.8878, -16.5579 |
| Mangrove | 5,915.7 | 5.87 | 12.7746, -16.6924 |
| Mangrove | 5,764.9 | 5.85 | 13.9414, -16.7107 |
| Mangrove | 5,319.9 | 5.80 | 12.6622, -16.7175 |
| Mangrove | 3,661.5 | 5.58 | 12.7072, -16.5808 |
| Mangrove | 3,510.7 | 5.56 | 12.6628, -16.5325 |
| Mangrove | 3,404.4 | 5.54 | 12.7538, -16.6913 |
| Mangrove | 3,384.6 | 5.53 | 12.6339, -16.4740 |
| Mangrove | 3,044.9 | 5.47 | 13.6415, -16.5284 |
| Mangrove | 2,897.0 | 5.44 | 12.5989, -16.4163 |
Most irregular outlines
Shape index (perimeter ÷ circle perimeter): high values suggest jagged or sliver-like edges
| Formation | Area (ha) | Shape idx | Location |
|---|---|---|---|
| Mangrove | 2,897.02 | 18.6 | 12.5989, -16.4163 |
| Mangrove | 2,120.04 | 17.7 | 12.5579, -16.4373 |
| Mangrove | 5,764.89 | 16.1 | 13.9414, -16.7107 |
| Mangrove | 5,319.86 | 15.8 | 12.6622, -16.7175 |
| Mangrove | 1,252.26 | 15.5 | 12.5547, -16.4848 |
| Mangrove | 732.27 | 15.4 | 12.8659, -16.5852 |
| Mangrove | 654.80 | 15.2 | 12.5305, -16.5040 |
| Mangrove | 6,776.39 | 14.5 | 13.8878, -16.5579 |
| Mangrove | 1,081.03 | 14.3 | 12.8317, -16.6271 |
| Mangrove | 5,915.72 | 13.9 | 12.7746, -16.6924 |
| Mangrove | 3,404.44 | 13.1 | 12.7538, -16.6913 |
| Mangrove | 635.36 | 12.7 | 12.8083, -16.5624 |
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.