Google Map 谷歌地图轨迹标注

2019-12-31  本文已影响0人  於風聽語

本文主要简单记录轨迹标注

开场白

项目涉及国外使用,需要使用 Google Map 进行轨迹标注

不得不吐槽谷歌地图文档的杂乱,有点难找,不过轨迹标注官方就自带简单示例 Simple Polylines

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Simple Polylines</title>
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>

      // This example creates a 2-pixel-wide red polyline showing the path of
      // the first trans-Pacific flight between Oakland, CA, and Brisbane,
      // Australia which was made by Charles Kingsford Smith.

      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 3,
          center: {lat: 0, lng: -180},
          mapTypeId: 'terrain'
        });

        var flightPlanCoordinates = [
          {lat: 37.772, lng: -122.214},
          {lat: 21.291, lng: -157.821},
          {lat: -18.142, lng: 178.431},
          {lat: -27.467, lng: 153.027}
        ];
        var flightPath = new google.maps.Polyline({
          path: flightPlanCoordinates,
          geodesic: true,
          strokeColor: '#FF0000',
          strokeOpacity: 1.0,
          strokeWeight: 2
        });

        flightPath.setMap(map);
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>
运行效果

划线使用的 API 是 https://developers.google.cn/maps/documentation/javascript/reference/polygon#Polyline

但是啊

这个有点丑,可是呢,长的丑,想玩花,花如(不是如花哦 ⊙ω⊙)滴滴这类的:

分析分析有哪些需要实现:

好,下面逐个实现

使用 Marker 实现起点、终点

官方简单 Marker 示例 Simple Markers

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Simple Markers</title>
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>

      function initMap() {
        var myLatLng = {lat: -25.363, lng: 131.044};

        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 4,
          center: myLatLng
        });

        var marker = new google.maps.Marker({
          position: myLatLng,
          map: map,
          title: 'Hello World!'
        });
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>
运行效果

这个图标差了点,来改造改造,参考 Marker 文档,可以看到详细 google.maps.MarkerOptions

可以看到一项 icon:

google.maps.MarkerOptions

也就是 icon 可以指定 Marker 图标,那么 Icon 又是啥,点开 链接 可以看到:

google.maps.Icon

好的,简单,先搞个图片:

起点图标

那么我们构造 Marker 如下:

const marker = new google.maps.Marker({
    position: {lat: -25.363, lng: 131.044},
    title: '起点',
    icon: {
        url: '/spotlight-start.png', // icon 图片地址
        scaledSize: { // 缩放至什么尺寸,单位 px,注意宽高必须是 Number
            width: 45,
            height: 45
        }
    }
})

图片我网上随便找的,你们可以找设计画一画

运行效果

然后终点什么的也就类似

接下来画线

Polyline 画轨迹线

示例就是开头那个,这里直接看 google.maps.PolylineOptions

google.maps.PolylineOptions

可以看到可以利用 strokeColorstrokeOpacitystrokeWeight 控制画线的 颜色、透明度、粗细

还可以看到 icons 选项,用来渲染 icons 到线上,来看看 google.maps.IconSequence

google.maps.IconSequence

具体的就不展开了,需要用到 icon,这个 icon 是个 Symbol:

Symbol

东西有点多,直接套代码吧:

// 箭头符号
const lineSymbol = {
    path: google.maps.SymbolPath.FORWARD_OPEN_ARROW,
    fillColor: '#FFF',
    strokeColor: '#FFF',
    scale: 0.9,
    strokeWeight: 3,
    fillOpacity: 0.8
}

new google.maps.Polyline({
    path: [], // 坐标数组,这个自己填吧
    strokeColor: "#F7523C", // 线条颜色
    icons: [{
        icon: lineSymbol,
        offset: '0',
        repeat: '5%'
    }],
    strokeOpacity: .8, // 线条透明度
    strokeWeight: 10  // 线条粗细
})

完整代码

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Simple Polylines</title>
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>

      // This example creates a 2-pixel-wide red polyline showing the path of
      // the first trans-Pacific flight between Oakland, CA, and Brisbane,
      // Australia which was made by Charles Kingsford Smith.

      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 3,
          center: {lat: 0, lng: -180},
          mapTypeId: 'terrain'
        });

        var flightPlanCoordinates = [
          {lat: 37.772, lng: -122.214},
          {lat: 21.291, lng: -157.821},
          {lat: -18.142, lng: 178.431},
          {lat: -27.467, lng: 153.027}
        ];
        // 箭头符号
        var lineSymbol = {
          path: google.maps.SymbolPath.FORWARD_OPEN_ARROW,
          fillColor: '#FFF',
          strokeColor: '#FFF',
          scale: 0.9,
          strokeWeight: 3,
          fillOpacity: 0.8
        };
        var flightPath = new google.maps.Polyline({
          path: flightPlanCoordinates,
          strokeColor: "#F7523C", // 线条颜色
          icons: [{
            icon: lineSymbol,
            offset: '0',
            repeat: '5%'
          }],
          strokeOpacity: .8, // 线条透明度
          strokeWeight: 10  // 线条粗细
        });
        var startMarker = new google.maps.Marker({
          position: flightPlanCoordinates[0],
          title: '起点',
          icon: {
            url: '/spotlight-start.png', // icon 图片地址
            scaledSize: { // 缩放至什么尺寸,单位 px,注意宽高必须是 Number
              width: 45,
              height: 45
            }
          }
        });
        var endMarker = new google.maps.Marker({
          position: flightPlanCoordinates[flightPlanCoordinates.length - 1],
          title: '终点',
          icon: {
            url: '/spotlight-end.png', // icon 图片地址
            scaledSize: { // 缩放至什么尺寸,单位 px,注意宽高必须是 Number
              width: 45,
              height: 45
            }
          }
        });

        flightPath.setMap(map);
        startMarker.setMap(map);
        endMarker.setMap(map);
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>
运行效果

实际项目效果如下,可以自行加上 InfoWindow 等:

总结

轨迹里面的箭头其实有点小问题,就是地图缩小的时候,显示毕竟密集,不过问题不大

只是简单使用,其实网上还有些骚操作,比如轨迹动画什么的

毕竟坑的无疑就是谷歌地图 Key 的申请了,现在还要信用卡绑定,真是麻烦

图标什么的可以自己画,这样效果会更好,我就是网上随便找的改改而已

人老了,开始要备份了,诶

再见了,2019

—— 2019/12/31 By Vinci, Mostly Sunny.

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