Atlas · Republic of the Congo
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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
302.8 ha
Largest patch 23.8% of area
Largest-size outliers
z-score of ln(area): how many standard deviations above typical
| Formation | Area (ha) | z | Location |
|---|---|---|---|
| Mangrove | 714.4 | 5.16 | -4.4679, 11.7300 |
| Mangrove | 483.5 | 4.91 | -4.4221, 11.7343 |
| Mangrove | 337.4 | 4.67 | -4.4588, 11.7154 |
| Mangrove | 148.6 | 4.13 | -4.0136, 11.2707 |
| Mangrove | 66.2 | 3.60 | -4.4418, 11.6849 |
| Mangrove | 62.9 | 3.57 | -4.1465, 11.4433 |
| Mangrove | 62.2 | 3.56 | -3.9322, 11.3391 |
| Mangrove | 51.5 | 3.44 | -4.0066, 11.2674 |
| Mangrove | 42.4 | 3.31 | -3.9417, 11.3426 |
| Mangrove | 36.9 | 3.22 | -4.0150, 11.2582 |
Most irregular outlines
Shape index (perimeter ÷ circle perimeter): high values suggest jagged or sliver-like edges
| Formation | Area (ha) | Shape idx | Location |
|---|---|---|---|
| Mangrove | 483.49 | 6.8 | -4.4221, 11.7343 |
| Mangrove | 148.55 | 6.0 | -4.0136, 11.2707 |
| Mangrove | 42.36 | 5.2 | -3.9417, 11.3426 |
| Mangrove | 337.40 | 5.1 | -4.4588, 11.7154 |
| Mangrove | 62.85 | 5.0 | -4.1465, 11.4433 |
| Mangrove | 22.55 | 4.9 | -4.3429, 11.5604 |
| Mangrove | 62.16 | 4.7 | -3.9322, 11.3391 |
| Mangrove | 30.04 | 4.6 | -4.1430, 11.4268 |
| Mangrove | 66.22 | 4.6 | -4.4418, 11.6849 |
| Mangrove | 14.62 | 4.5 | -4.1373, 11.4085 |
| Mangrove | 22.20 | 4.2 | -4.2014, 11.3933 |
| Mangrove | 22.89 | 4.1 | -4.9803, 11.9806 |
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.