気象庁天気予報のAPIを使ってみた

Bonjour!!

以前作ったその日の降水確率を朝7時に知らせてくれるLineBotが突然動かなくなりました

朝AM7：00に名古屋の降水確率を知らせるLine Bot

ちょっと調べてみるとどうやらサイトのレイアウトが変わったようです。

前回はphpqueryを利用してサイト上の情報をスクレイピングしているので、

レイアウトが変更されるとどうしてもそのたびに修正が必要になってきますね。

そんな中気象庁の天気予報にAPIが用意されたという情報を見かけました

→気象庁公式の天気予報API（？）が発見 ～Twitterの開発者界隈に喜びの声が満ちる

気象庁の中の人によるとオフィシャルなAPIではないようですが、利用に関しては

ルールに則ってすれば問題内容なので、さっそく使ってみました。

以下のエンドポイントにアクセスするとJSON形式で情報が表示されます。

（forecastのあとの数字を変えると別の地域の予報を取得できます。）

名古屋の天気→https://www.jma.go.jp/bosai/forecast/data/forecast/230000.json

そのままだととても見づらいので、整形してくれるサイトの力を借りて見やすい形にします。

1. [
2.     {
3.         “publishingOffice”: “名古屋地方気象台”,
4.         “reportDatetime”: “2021-04-19T17:00:00+09:00”,
5.         “timeSeries”: [
6.             {
7.                 “timeDefines”: [
8.                     “2021-04-19T17:00:00+09:00”,
9.                     “2021-04-20T00:00:00+09:00”,
10.                     “2021-04-21T00:00:00+09:00”
11.                 ],
12.                 “areas”: [
13.                     {
14.                         “area”: {
15.                             “name”: “西部”,
16.                             “code”: “230010”
17.                         },
18.                         “weatherCodes”: [
19.                             “100”,
20.                             “100”,
21.                             “100”
22.                         ],
23.                         “weathers”: [
24.                             “晴れ”,
25.                             “晴れ”,
26.                             “晴れ”
27.                         ],
28.                         “winds”: [
29.                             “北西の風”,
30.                             “北西の風”,
31.                             “北西の風　後　西の風”
32.                         ],
33.                         “waves”: [
34.                             “０．５メートル”,
35.                             “０．５メートル”,
36.                             “０．５メートル”
37.                         ]
38.                     },
39.                     {
40.                         “area”: {
41.                             “name”: “東部”,
42.                             “code”: “230020”
43.                         },
44.                         “weatherCodes”: [
45.                             “100”,
46.                             “100”,
47.                             “100”
48.                         ],
49.                         “weathers”: [
50.                             “晴れ”,
51.                             “晴れ”,
52.                             “晴れ”
53.                         ],
54.                         “winds”: [
55.                             “北西の風　東三河南部　では　はじめ　北西の風　やや強く”,
56.                             “北西の風”,
57.                             “北西の風　後　西の風”
58.                         ],
59.                         “waves”: [
60.                             “１．５メートル　ただし　内海　では　０．５メートル”,
61.                             “１．５メートル　ただし　内海　では　０．５メートル”,
62.                             “１．５メートル　ただし　内海　では　０．５メートル”
63.                         ]
64.                     }
65.                 ]
66.             },
67.             {
68.                 “timeDefines”: [
69.                     “2021-04-19T18:00:00+09:00”,
70.                     “2021-04-20T00:00:00+09:00”,
71.                     “2021-04-20T06:00:00+09:00”,
72.                     “2021-04-20T12:00:00+09:00”,
73.                     “2021-04-20T18:00:00+09:00”
74.                 ],
75.                 “areas”: [
76.                     {
77.                         “area”: {
78.                             “name”: “西部”,
79.                             “code”: “230010”
80.                         },
81.                         “pops”: [
82.                             “0”,
83.                             “0”,
84.                             “0”,
85.                             “0”,
86.                             “0”
87.                         ]
88.                     },
89.                     {
90.                         “area”: {
91.                             “name”: “東部”,
92.                             “code”: “230020”
93.                         },
94.                         “pops”: [
95.                             “0”,
96.                             “0”,
97.                             “0”,
98.                             “0”,
99.                             “0”
100.                         ]
101.                     }
102.                 ]
103.             },
104.             {
105.                 “timeDefines”: [
106.                     “2021-04-20T00:00:00+09:00”,
107.                     “2021-04-20T09:00:00+09:00”
108.                 ],
109.                 “areas”: [
110.                     {
111.                         “area”: {
112.                             “name”: “名古屋”,
113.                             “code”: “51106”
114.                         },
115.                         “temps”: [
116.                             “8”,
117.                             “25”
118.                         ]
119.                     },
120.                     {
121.                         “area”: {
122.                             “name”: “豊橋”,
123.                             “code”: “51331”
124.                         },
125.                         “temps”: [
126.                             “9”,
127.                             “22”
128.                         ]
129.                     }
130.                 ]
131.             }
132.         ]
133.     },
134.     {
135.         “publishingOffice”: “名古屋地方気象台”,
136.         “reportDatetime”: “2021-04-19T17:00:00+09:00”,
137.         “timeSeries”: [
138.             {
139.                 “timeDefines”: [
140.                     “2021-04-20T00:00:00+09:00”,
141.                     “2021-04-21T00:00:00+09:00”,
142.                     “2021-04-22T00:00:00+09:00”,
143.                     “2021-04-23T00:00:00+09:00”,
144.                     “2021-04-24T00:00:00+09:00”,
145.                     “2021-04-25T00:00:00+09:00”,
146.                     “2021-04-26T00:00:00+09:00”
147.                 ],
148.                 “areas”: [
149.                     {
150.                         “area”: {
151.                             “name”: “愛知県”,
152.                             “code”: “230000”
153.                         },
154.                         “weatherCodes”: [
155.                             “100”,
156.                             “100”,
157.                             “101”,
158.                             “101”,
159.                             “201”,
160.                             “201”,
161.                             “201”
162.                         ],
163.                         “pops”: [
164.                             “”,
165.                             “0”,
166.                             “10”,
167.                             “20”,
168.                             “30”,
169.                             “30”,
170.                             “30”
171.                         ],
172.                         “reliabilities”: [
173.                             “”,
174.                             “”,
175.                             “A”,
176.                             “A”,
177.                             “A”,
178.                             “A”,
179.                             “A”
180.                         ]
181.                     }
182.                 ]
183.             },
184.             {
185.                 “timeDefines”: [
186.                     “2021-04-20T00:00:00+09:00”,
187.                     “2021-04-21T00:00:00+09:00”,
188.                     “2021-04-22T00:00:00+09:00”,
189.                     “2021-04-23T00:00:00+09:00”,
190.                     “2021-04-24T00:00:00+09:00”,
191.                     “2021-04-25T00:00:00+09:00”,
192.                     “2021-04-26T00:00:00+09:00”
193.                 ],
194.                 “areas”: [
195.                     {
196.                         “area”: {
197.                             “name”: “名古屋”,
198.                             “code”: “51106”
199.                         },
200.                         “tempsMin”: [
201.                             “”,
202.                             “9”,
203.                             “11”,
204.                             “13”,
205.                             “14”,
206.                             “13”,
207.                             “13”
208.                         ],
209.                         “tempsMinUpper”: [
210.                             “”,
211.                             “13”,
212.                             “13”,
213.                             “14”,
214.                             “16”,
215.                             “15”,
216.                             “15”
217.                         ],
218.                         “tempsMinLower”: [
219.                             “”,
220.                             “8”,
221.                             “9”,
222.                             “11”,
223.                             “12”,
224.                             “10”,
225.                             “10”
226.                         ],
227.                         “tempsMax”: [
228.                             “”,
229.                             “26”,
230.                             “27”,
231.                             “25”,
232.                             “22”,
233.                             “23”,
234.                             “23”
235.                         ],
236.                         “tempsMaxUpper”: [
237.                             “”,
238.                             “28”,
239.                             “29”,
240.                             “27”,
241.                             “26”,
242.                             “26”,
243.                             “26”
244.                         ],
245.                         “tempsMaxLower”: [
246.                             “”,
247.                             “24”,
248.                             “25”,
249.                             “22”,
250.                             “19”,
251.                             “20”,
252.                             “20”
253.                         ]
254.                     }
255.                 ]
256.             }
257.         ],
258.         “tempAverage”: {
259.             “areas”: [
260.                 {
261.                     “area”: {
262.                         “name”: “名古屋”,
263.                         “code”: “51106”
264.                     },
265.                     “min”: “11.0”,
266.                     “max”: “21.2”
267.                 }
268.             ]
269.         },
270.         “precipAverage”: {
271.             “areas”: [
272.                 {
273.                     “area”: {
274.                         “name”: “名古屋”,
275.                         “code”: “51106”
276.                     },
277.                     “min”: “12.8”,
278.                     “max”: “34.7”
279.                 }
280.             ]
281.         }
282.     }
283. ]

3日分の天気予報の情報が含まれています。

今回のボットは当日の3つの時間帯での降水確率を取得したいので、以下のようになります。

1. $rain_day[0] = $arr[0][“timeSeries”][1][“areas”][0][“pops”][0];　/*6-12*/
2. $rain_day[1] = $arr[0][“timeSeries”][1][“areas”][0][“pops”][1];     /*12-18*/
3. $rain_day[2] = $arr[0][“timeSeries”][1][“areas”][0][“pops”][2];   /*18-24*/

他にも最大気温や最低気温といった情報もとってこれます。

これで気象庁がこのJSONを基にページを作っている限りはレイアウト変更があってもBotが途切れることはなくなりました。

ではAu revoir！！！