python 从具有坐标的列创建一个包含多边形的列

Question

我需要向我的 df (df['poly']) 添加一列，它采用 df['coords'] 中的坐标（纬度和经度）并将它们转换为不同大小的多边形.有的key_id只有两分，有的有将近20分

我试过 shapely 但我不知道如何进行。我能做什么？

我的 df 有类似的结构：


df = pd.DataFrame ({'key_id': ['151,'244','245'],

                    'coords': [[[-8.37793, 37.42726],
                               [-8.29726, 37.42958],
                               [-8.1975, 37.35019],
                               [-8.07657, 37.3241],
                               [-7.98004, 37.40123],
                               [-7.73969, 37.49087],
                               [-7.51269, 37.52626]],

                              [[28.44261, 38.10466],
                               [28.61609, 38.08959]],

                              [[-5.7376, 40.29416],
                               [-5.78421, 40.292],
                               [-5.81097, 40.34586],
                               [-5.92499, 40.28829],
                               [-5.97971, 40.29835],
                               [-6.22156, 40.48251],
                               [-6.53513, 40.34072], 
                               [-6.59286, 40.27262],
                               [-6.77174, 40.24218],
                               [-6.86514, 40.27069]]]

                   })

Answer 1

已下载：https://gisco-services.ec.europa.eu/distribution/v2/nuts/download/ref-nuts-2021-60m.geojson.zip
简单使用geopandas，无需弄清楚如何构建多边形

import json
import geopandas as gpd
from pathlib import Path
# NUTS_BN_60M_2021_3035.geojson
p = Path.home().joinpath("Downloads/ref-nuts-2021-60m").joinpath("NUTS_BN_60M_2021_3035.geojson")
with open(p) as f: js = json.load(f)
gpd.GeoDataFrame.from_features(js)

示例输出

	geometry	EU_FLAG	EFTA_FLAG	CC_FLAG	LEVL_CODE	NUTS_BN_ID	COAS_FLAG	OTHR_FLAG	FID
0	LINESTRING (4710072.1544 1558882.7113, 4682530.865 1568851.5189)	T	F	F	0	155	T	F	155
1	LINESTRING (4750146.4639 1575613.1831, 4719326.4198 1565032.5462)	T	F	F	3	156	F	F	156
2	LINESTRING (4750146.4639 1575613.1831, 4771337.8016 1529624.4864)	T	F	F	3	157	F	F	157
3	LINESTRING (5708788.4877 1703805.8981, 5716323.6218 1677819.7608, 5699205.566099999 1671425.5691, 5689132.9338 1687843.7667, 5674013.6588 1672224.311, 5660024.3965 1679252.6566, 5666955.0392 1699891.5505, 5708788.4877 1703805.8981)	T	F	F	0	158	T	F	158
4	LINESTRING (2862160.935 1681571.7459, 2817387.2651 1732249.228499999, 2777974.267 1743031.7994)	T	F	F	0	159	T	F	159

python 从具有坐标的列创建一个包含多边形的列

python create a column with polygons from column with coordinates

python

python-3.x

pandas

shapely

示例输出