使用 geopy 从 pandas 数据框中的坐标查找国家/地区名称

Question

我正在尝试使用

pandas

确定

geopy

数据框中每一行的国家/地区名称。我拥有的是：

import pandas as pd
from geopy.geocoders import GoogleV3

df = pd.DataFrame({'ser_no': [1, 1, 1, 2, 2, 2],
                'lat': [53.57, 35.52, 35.53, 54.66, 54.67, 55.8],
                'lon': [-117.20, -98.29, -98.32, -119.48, -119.47, -119.46]})

def get_country(locations):
    locations = geolocator.reverse(row['lat'], row['lon'], timeout = 10)
    for location in locations:
        for component in location.raw['address_components']:
            if 'country' in component['types']:
                return component['long_name']

my_key = my_api_key                   
geolocator = GoogleV3(my_key, proxies ={"http": 'my proxy',
                                        "https": 'my proxy'})

df['country'] = df.apply(lambda row: get_country(row), axis = 1)

此返回

     lat     lon  ser_no                                       country
0  53.57 -117.20       1  <function get_country at 0x000000000F6F9C88>
1  35.52  -98.29       1  <function get_country at 0x000000000F6F9C88>
2  35.53  -98.32       1  <function get_country at 0x000000000F6F9C88>
3  54.66 -119.48       2  <function get_country at 0x000000000F6F9C88>
4  54.67 -119.47       2  <function get_country at 0x000000000F6F9C88>
5  55.80 -119.46       2  <function get_country at 0x000000000F6F9C88>

没有发生错误，但我的输出没有用。我不确定它只是返回错误还是我的

apply

有问题。

Answer 1

geolocator.reverse

需要一个字符串，所以你需要将你的函数更改为：

def get_country(row):
    pos = str(row['lat']) + ', ' + str(row['lon'])
    locations = geolocator.reverse(pos, timeout = 10)
    #... rest of func the same

Answer 2

这里有关于提名和地理编码的详细教程：https://medium.com/python-in-plain-english/how-to-use-geocoding-libraries-to-visualise-pakistans-conflict-data-f16b4a52853c