letswrite-google-map-api-2/polyline.html at master · letswritetw/letswrite-google-map-api-2 · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Simple Polyline, Polygon - Google Maps API demo - August - Let's Write</title>
    <link rel="canonical" href="https://www.letswrite.tw/google-map-api-geometry/">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
    <style>
      .container {
        padding-top: 30px;
        padding-bottom: 30px;
      }
      #map {
        background: #CCC;
      }
      .fixed-bottom {
        position: fixed;
        left: 16px;
        bottom: 0;
        max-width: 320px;
      }
    </style>

    <link rel="shortcut icon" href="https://letswritetw.github.io/letswritetw/dist/img/logo_512.png"/>
    <!-- Google Tag Manager-->
    <script>
      (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
      new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
      })(window,document,'script','dataLayer','GTM-PGQ9WQT');
    </script>
  </head>
  <body>

    <!-- Google Tag Manager (noscript)-->
    <noscript>
      <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PGQ9WQT" height="0" width="0" style="display:none;visibility:hidden"></iframe>
    </noscript>

    <div id="app" class="container">

      <div class="row">
        <div class="col">
          <div id="map" class="embed-responsive embed-responsive-16by9"></div>
        </div>
      </div>

      <div class="row fixed-bottom">
        <div class="col">
          <div class="alert alert-info" role="alert">
            Let's Write 筆記文：<br/>
            <a href="https://letswrite.tw/google-map-api-geometry/" target="_blank">Google Maps API學習筆記-2：在地圖上畫個日本結界</a>
          </div>
        </div>
      </div>

    </div>

    <!-- 將 YOUR_API_KEY 替換成你的 API Key 即可 -->
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY" async defer></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"></script>

    <!-- map -->
    <script>
      const googleMap = new Vue({
        el: '#app',
        data: {
          map: null,
          simplePolyline: [], // 存入折線圖的點
          simplePolygon: [] // 存入多邊形的點
        },
        methods: {
          // init google map
          initMap() {

            // 預設顯示的地點：靖國神社
            let location = {
              lat: 35.694136, // 經度
              lng: 139.743849 // 緯度
            };

            // 建立地圖
            this.map = new google.maps.Map(document.getElementById('map'), {
              center: location,
              zoom: 13,
              mapTypeId: 'terrain'
            });


            // 畫折線圖：平將門北斗七星
            fetch('./big-dipper.geojson')
              .then(results => results.json())
              .then(result => {
                let res = result.features;
                let flightPlanCoordinates = [];
                Array.prototype.forEach.call(res, r => {
                  let latLng = new google.maps.LatLng(r.geometry.coordinates[0], r.geometry.coordinates[1]);
                  let marker = new google.maps.Marker({
                    position: latLng,
                    map: this.map
                  });
                  // info window
                  let infowindow = new google.maps.InfoWindow({
                    content: `<span class="font-weight-bold">${r.properties.name}</span>` // 支援html
                  });

                  infowindow.open(this.map, marker);

                  // 將每個折線的點存入 simplePolyline
                  this.simplePolyline.push({
                    lat: r.geometry.coordinates[0],
                    lng: r.geometry.coordinates[1]
                  });

                });

                // 畫折線圖
                let polyline = new google.maps.Polyline({
                  path: this.simplePolyline,
                  geodesic: true,
                  strokeColor: '#FF0000',
                  strokeOpacity: 1.0,
                  strokeWeight: 5
                });
                polyline.setMap(this.map);

            });


            // 畫多邊形：天皇正方形
            fetch('./polygon.geojson')
              .then(results => results.json())
              .then(result => {
                let res = result.features;
                let flightPlanCoordinates = [];
                Array.prototype.forEach.call(res, r => {
                  let latLng = new google.maps.LatLng(r.geometry.coordinates[0], r.geometry.coordinates[1]);
                  let marker = new google.maps.Marker({
                    position: latLng,
                    map: this.map
                  });
                  // info window
                  let infowindow = new google.maps.InfoWindow({
                    content: `<span class="font-weight-bold">${r.properties.name}</span>` // 支援html
                  });

                  infowindow.open(this.map, marker);

                  // 將每個正方形的點存入 simplePolygon
                  this.simplePolygon.push({
                    lat: r.geometry.coordinates[0],
                    lng: r.geometry.coordinates[1]
                  });

                });

                // 刪掉最後一個正方形中心點的座標
                this.simplePolygon.pop();

                // 畫多邊形圖
                var bermudaTriangle = new google.maps.Polygon({
                  paths: this.simplePolygon,
                  strokeColor: '#f1c40f',
                  strokeOpacity: 0.8,
                  strokeWeight: 5,
                  fillColor: '#f1c40f',
                  fillOpacity: 0.24
                });
                bermudaTriangle.setMap(this.map);

            });

            // 補多邊形的折線
            let polylineLeft = new google.maps.Polyline({
              path: [
                { lat: 35.7229985, lng: 139.7198027 },
                { lat: 35.694136, lng: 139.743849 },
                { lat: 35.6667348, lng: 139.7718534 }
              ],
              geodesic: true,
              strokeColor: '#f1c40f',
              strokeOpacity: 1.0,
              strokeWeight: 5
            });
            polylineLeft.setMap(this.map);

            let polylineRight = new google.maps.Polyline({
              path: [
                { lat: 35.7242569, lng: 139.7716722 },
                { lat: 35.694136, lng: 139.743849 },
                { lat: 35.667028, lng: 139.7219214 }
              ],
              geodesic: true,
              strokeColor: '#f1c40f',
              strokeOpacity: 1.0,
              strokeWeight: 5
            });
            polylineRight.setMap(this.map);

          }
        },
        created() {
          window.addEventListener('load', () => {
            this.initMap();
          });
        }
      });
    </script>

  </body>
</html>