# china-anhui

17,945 polygons from `china-anhui-latest.osm.pbf` on Geofabrik
([source](https://download.geofabrik.de/asia/china/anhui.html)), filtered by the
[22,075-tag whitelist](https://github.com/NoeFlandre/osm-stats) and
classified by continent + size bin.

| field | value |
|-------|-------|
| country | `china-anhui` |
| polygons | **17,945** |
| extract_status | **clean** |
| pbf_date | 2026-07-04 |
| source | `china-anhui-latest.osm.pbf` |
| Geofabrik extract | <https://download.geofabrik.de/asia/china/anhui.html> |

## Geometry

The parquet file in this folder
(`china-anhui.parquet`) has the same schema as the combined
`combined/all_world.parquet`. Each row carries the polygon
**geometry as WKT** (default), plus centroid + area + the
whitelist-matched tag.

Load with:

```python
import pyarrow.parquet as pq
table = pq.read_table("per_country/china-anhui/china-anhui.parquet")
df = table.to_pandas()
# df["geometry_wkt"] is a column of WKT strings; parse with shapely.wkt.loads
```

## Notes

China-Anhui has 17,945 polygons in this dataset. Extract status: **clean**. Source: Geofabrik [`china-anhui-latest.osm.pbf`](https://download.geofabrik.de/asia/china/anhui.html).