Question

我想突出显示下面图片中的区域，该区域取自Google Maps。使用当前版本的API（v3）可以实现这一目标吗？如果是，怎么样？

google-maps-highlight

提前致谢。

Answer 1

您需要知道区域的顶点并根据它们创建多边形。

但是多边形当前不支持虚线笔划，如果需要使用虚线笔划，则必须根据顶点创建一系列具有不同笔触颜色的折线。

当前不存在突出显示区域的内置方法。

Answer 2

您可以使用Google Maps Javascript API自动突出显示区域，这是一个示例：

<!DOCTYPE html>
<html>
  <head>
    <title>Place ID Finder</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <style>
      #map {
        height: 100%;
      }

      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }

      #ggg
      {
          position: absolute;
          left:20%;
          top:5%;
      }

      .controls {
        background-color: #fff;
        border-radius: 2px;
        border: 1px solid transparent;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
        box-sizing: border-box;
        font-family: Roboto;
        font-size: 15px;
        font-weight: 300;
        height: 29px;
        margin-left: 17px;
        margin-top: 10px;
        outline: none;
        padding: 0 11px 0 13px;
        text-overflow: ellipsis;
        width: 400px;
      }

      .controls:focus {
        border-color: #4d90fe;
      }
      .title {
        font-weight: bold;
      }
      #infowindow-content {
        display: none;
      }
      #map #infowindow-content {
        display: inline;
      }

    </style>
  </head>
  <body>
    <div style="display: none">
        <input id="pac-input" class="controls" type="text" placeholder="Enter a location">
    </div>
    <div id="map"></div>
    <div id="infowindow-content">
        <span id="place-name" class="title"></span><br>
        <strong>Place ID:</strong> <span id="place-id"></span><br>
        <span id="place-address"></span>
    </div>

    <script>
      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          center: {lat: 37.9989746, lng: 23.6413698},
          zoom: 11
        });

        var input = document.getElementById('pac-input');

        var autocomplete = new google.maps.places.Autocomplete(input);
        autocomplete.bindTo('bounds', map);

        autocomplete.setFields(
            ['place_id', 'geometry', 'name', 'formatted_address']);

        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);

        var infowindow = new google.maps.InfoWindow();
        var infowindowContent = document.getElementById('infowindow-content');
        infowindow.setContent(infowindowContent);

        var marker = new google.maps.Marker({map: map});

        marker.addListener('click', function() {
          infowindow.open(map, marker);
        });

        autocomplete.addListener('place_changed', function() {
          infowindow.close();

          var place = autocomplete.getPlace();

          if (!place.geometry) {
            return;
          }

          if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
          } else {
            map.setCenter(place.geometry.location);
            map.setZoom(17);
          }

          marker.setPlace({
            placeId: place.place_id,
            location: place.geometry.location,
          });

          marker.setVisible(true);

          infowindowContent.children['place-name'].textContent = place.name;
          infowindowContent.children['place-id'].textContent = place.place_id;
          infowindowContent.children['place-address'].textContent = place.formatted_address;
          infowindow.open(map, marker);

           var frame = document.getElementById("map");

           frame.innerHTML = '<iframe width="100%" height="100%" frameborder="0" style="border:0" src="https://www.google.com/maps/embed/v1/place?q=place_id:'.concat(place.place_id).concat('&key=XXXXXXX" allowfullscreen></iframe>');

           frame.innerHTML += '<p id="ggg"><button type="button" onclick="location.reload()">Try again!</button></p>';
        });
      }

    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=XXXXXXXXX&libraries=places&callback=initMap" async defer></script>

</body>
</html>

您将需要用API KEY替换API KEY。尝试在输入中输入“ Nea Smyrni 171 21，Greece”，然后选择第一个下拉选项，注意它会自动突出显示该区域！

使用Google Maps JavaScript API v3突出显示某个区域

2 个答案: