python - 从 GeoJSON 对象创建 GeoDataFrame

Question

我有一个多边形的特征集合，我必须先把它写在一个临时文件中然后加载它geopandas.GeoDataFrame.from_file(tmp_json_file)，有没有办法不写临时文件而只GeoDataFrame从GeoJSON对象创建？

Answer 1

您可以为此使用该GeoDataFrame.from_features()功能。一个小例子（假设你有一个 geojson FeatureCollection）：

In [1]: from geojson import Feature, Point, FeatureCollection

In [2]: my_feature = Feature(geometry=Point((1.6432, -19.123)), properties={"country": "Spain"})

In [3]: my_other_feature = Feature(geometry=Point((-80.234, -22.532)), properties={'country': 'Brazil'})

In [4]: collection = FeatureCollection([my_feature, my_other_feature])

In [6]: import geopandas

In [7]: geopandas.GeoDataFrame.from_features(collection['features'])
Out[7]:
  country                 geometry
0   Spain   POINT (1.6432 -19.123)
1  Brazil  POINT (-80.234 -22.532)