我有一个多边形列表，我想按 road_name 属性对它们进行分组并展平多边形。
我尝试了以下方法：
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import geopandas as gpd
gdf = gpd.GeoDataFrame.from_features(polygons_list['features'])
gdf.geometry.unary_union
这给了我以下错误：TopologyException：无法将空闲孔分配给位于 138.63339999999999 -34.869500000000002 的外壳
关于如何解决此问题或解决方法有什么想法吗？
我通过确保几何形状有效解决了类似的问题。在 PostGIS 中我使用了 ST_MakeValid()。在 geopandas 中，geometry.buffer(0) 可能会有所帮助。
这是在 Geopandas 中包含缓冲区的示例：
gdf['geo_col'] = gdf['geo_col'] \
.to_crs('+proj=cea') \
.buffer(2) \
.to_crs('epsg:4326')