谷歌、腾讯、百度相应API批量获取地理位置坐标信息及其优缺点

 1 # coding : utf-8
 2 
 3 """
 4 This program use api to get lon/lat data.
 5 """
 6 
 7 import sys
 8 import requests
 9 
10 def get_degree():
11 
12     local_path = 'D:/home/research/lung_cancer/data/pm25/process/'
13 
14     # 把文本文件里的城市全部放入list里面
15     csv_path = local_path + 'city_2014.csv'
16     loc_list= []
17     line_list = []
18     with open(csv_path, 'r') as handle:
19         for line in handle.readlines()[1:]:
20             loc = line.split(',')[1]
21             loc_list.append(loc)
22             line_list.append(line.strip())
23 
24     num = 0
25 
26     # 将坐标信息写入的新文本文件
27     new_path = local_path + 'city_2014_google.csv'
28     f_handle = open(new_path, 'w')
29 
30     for i in range(len(loc_list)):
31         loc = loc_list[i]
32         try:
33             # Three type apis:baidu,qq,google.
34             # 百度API
35             # request = ('http://api.map.baidu.com/geocoder/v2/?address=' + loc 
36             #         + '&output=json&ak=你的ak')
37             # 腾讯API
38             # request = ('http://apis.map.qq.com/ws/geocoder/v1/?address=' + loc
39             #         + '&key=你的key')
40             # 谷歌API
41             request = ('https://maps.googleapis.com/maps/api/geocode/json?address='
42                     + loc + '&key=你的key')
43             response = requests.get(request)
44             response.raise_for_status()
45             num += 1
46             print('HTTP request successed!--{}'.format(num))
47         except Exception as e:
48             print('HTTP request failed!-{}'.format(str(e)))
49 
50         print(response.text)
51 
52         # eval将json字符串转变为字典
53         lat = eval(response.text)['results'][0]['geometry']['location']['lat']
54         lng = eval(response.text)['results'][0]['geometry']['location']['lng']
55         # 将坐标信息写入硬盘
56         f_handle.write(line_list[i] + ',' + str(round(lat,2)) + ',' 
57                        + str(round(lng,2)) + '\n')