将纬度和经度放入距离矩阵中，python中的谷歌地图API

Question

我有一个以下格式的Pandas 数据框：dataframe。

现在我想把所有的起始纬度和起始经度对放到原点，把所有的结束纬度和结束经度对放到目的地。我想得到每一行的距离和持续时间，如下所示。预期输出：

    Rental Id | Distance | Duration | Status
0   51649420    0          0          OK
1   51649421    959        214        OK
2  
...
15

我尝试遵循两种方法，但它们都给了我超时错误。

方法一：

import googlemaps
from pandas.io.json import json_normalize
gmaps = googlemaps.Client(key='my API key')
for i in range (0,15):
origins = (journeydf['Start Latitude'][i], journeydf['Start Longitude'][i])
destinations = (journeydf['End Latitude'][i], journeydf['End Longitude'][i])
matrix = gmaps.distance_matrix(origins, destinations, mode="bicycling")
matrixdf = json_normalize(matrix,['rows','elements'])
matrixdf['Rental Id']=journeydf['Rental Id']

方法二：

import urllib, json, time
import pandas as pd

def google(lato, lono, latd, lond):

url = """http://maps.googleapis.com/maps/api/distancematrix/json?origins=%s,%s"""%(lato, lono)+  \
"""&destinations=%s,%s&mode=driving&language=en-EN&sensor=false"""% (latd, lond)

#CHANGE THIS FOR PYTHON 3.X TO urllib.request.urlopen(url)...
response = urllib.urlopen(url).read().decode('utf8')

#Wait a second so you don't overwhelm the API if doing lots of calls
time.sleep(1)

obj = json.loads(response)
try:
    minutes =   obj['rows'][0]['elements'][0]['duration']['value']/60
    miles = (obj['rows'][0]['elements'][0]['distance']['value']/100)*.62137 #kilometers per mile
    return minutes, miles
except IndexError:
    #something went wrong, the result was not found
    print (url)
    #return the error code
    return obj['Status'], obj['Status']

def ApplyGoogle(row):
lato, lono = row['Start Latitude'], row['Start Longitude']
latd, lond = row['End Latitude'], row['End Longitude']
return google(lato, lono, latd, lond)

journeydf['Minutes'], journeydf['Miles'] = zip(*journeydf.apply(ApplyGoogle, axis = 1))

有没有办法解决这个问题？提前致谢。

Answer 1

我很惊讶您使用方法 1 时遇到超时错误。您能确认输出吗？

您是否创建了 Google 地图 API 密钥？标准使用是免费的（每天 2,500 次距离计算，每次查询限制 100 次，每 10 秒限制 100 次） https://developers.google.com/maps/documentation/distance-matrix/get-api-key 该密钥需要写在你的代码有“我的 API 密钥”的地方

for 循环上的缩进以及起点和终点的分配也可能存在问题。试试这个：

# make sure you can connect to Google's server
import requests
try:
  response = requests.get('http://www.google.com')
except:
  print 'Can\'t connect to Google\'s server'
  raw_input('Press any key to exit.')
  quit()

# use the Google Maps API
import googlemaps
gmaps = googlemaps.Client(key='YOUR KEY')
origins = []
destinations = []
for i in range (0,15):
  origins.append(str(journeydf['Start Latitude'][i]) + ' ' + str(journeydf['Start Longitude'][i]))
  destinations.append(str(journeydf['End Latitude'][i]) + ' ' + str(journeydf['End Longitude'][i]))
matrix = gmaps.distance_matrix(origins, destinations, mode="bicycling")
print matrix