把緯度和經度到距離矩陣，在蟒蛇

Question

谷歌地圖API我有以下格式的熊貓數據幀：dataframe.

現在我希望把所有對啓動緯度和啓動經度爲起源並把所有的「結束緯度」和「結束經度」對放入目的地。我想要按照以下方式獲得每行的距離和持續時間。預期輸出：

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

我試過下面兩種方法，但他們都給我超時錯誤。

方法1：

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2：

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)) 

反正是有解決這個問題？提前致謝。

Answer 1

我很驚訝你會收到方法1的超時錯誤。你能確認輸出嗎？

您是否創建了Google Maps API密鑰？它是免費的標準使用（每天2500次距離計算，限100個查詢和限制100每10秒） https://developers.google.com/maps/documentation/distance-matrix/get-api-key 要寫入密鑰需要在您的代碼中有「我的API密鑰」

也可能有一個在for循環中發出縮進問題，並分配給開始和目標。試試這個：

# 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 

Answer 2

16 * 16 = 256> 100，所以可能嘗試與較小的矩陣即10×10，然後它應該工作。