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pythonでジオコーディング

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「東京タワー」や「両国国技館」のようなランドマーク名から正確な住所や緯度・経度等の地理情報を得ることをジオコーディングという。

Googleが公開しているAPIをpythonでたたいてみた。('17年11月現在、2500req/日のリミットレート)

まず調べたいスポット名をこんな風に書いて…

queries
東京タワー
両国国技館

以下のpython geo.pyを実行

geo.py
# -*- coding: utf-8 -*-
import requests
import json
from time import sleep

wait_time = 0.3 # (sec)
base_url = 'https://maps.googleapis.com/maps/api/geocode/json?language=ja&address={}&key=****YOUR_API_KEY***'
headers = {'content-type': 'application/json'}


queries = []
with open('./queries', 'r') as f:
    queries = f.readlines()

for q in queries:
    q = q.strip()
    url = base_url.format(q)
    r = requests.get(url, headers=headers)
    data = r.json()
    if 'results' in data and len(data['results']) > 0 and 'formatted_address' in data['results'][0]:
        print '{}@{}@{}@{}'.format(
            q,
            data['results'][0]['formatted_address'].encode('utf-8'),
            data['results'][0]['geometry']['location']['lat'],
            data['results'][0]['geometry']['location']['lng']
        )
    else:
        print '{}@ @ @ '.format(q)
    sleep(wait_time)

結果

東京タワー@日本、〒105-0011 東京都港区芝公園4丁目2−8@35.6585805@139.7454329
両国国技館@日本、〒130-0015 東京都墨田区横網1丁目3番28号@35.6969758@139.7932863

スポット名@正確な住所@緯度@経度@

という形で出力。

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