嵌入式 Google SearchControl 地图中的交通图层

Question

如何在网页上的 Google 地图中激活 Transit 图层？地图是使用搜索控件创建的。

<!-- ++Begin Map Search Control Wizard Generated Code++ -->
  <!--
  // Created with a Google AJAX Search Wizard
  // http://code.google.com/apis/ajaxsearch/wizards.html
  -->

  <!--
  // The Following div element will end up holding the map search control.
  // You can place this anywhere on your page
-->
  <div id="mapsearch">
    <span style="color:#676767;font-size:11px;margin:1px;padding:0px;">Loading map ...</span>
  </div>

  <!-- Maps Api, Ajax Search Api and Stylesheet
  // Note: If you are already using the Maps API then do not include it again
  //       If you are already using the AJAX Search API, then do not include it
  //       or its stylesheet again
  //
  // The Key Embedded in the following script tags is designed to work with
  // the following site:
  -->
  <script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAAxMICTqJZCQhVvaG5Z6vcbBQsQZTeCW4bnSEJHaQGIFLLp_Ev4hQzmbQjyOZxyLLe8CmaFaW5G3RI8g"
    type="text/javascript"></script>
  <script src="http://www.google.com/uds/api?file=uds.js&v=1.0&source=uds-msw&key=ABQIAAAAxMICTqJZCQhVvaG5Z6vcbBQsQZTeCW4bnSEJHaQGIFLLp_Ev4hQzmbQjyOZxyLLe8CmaFaW5G3RI8g"
    type="text/javascript"></script>
  <style type="text/css">
    @import url("http://www.google.com/uds/css/gsearch.css");
  </style>

  <!-- Map Search Control and Stylesheet -->
  <script type="text/javascript">
    window._uds_msw_donotrepair = true;
  </script>
  <script src="http://www.google.com/uds/solutions/mapsearch/gsmapsearch.js?mode=new"
    type="text/javascript"></script>
  <style type="text/css">
    @import url("http://www.google.com/uds/solutions/mapsearch/gsmapsearch.css");
  </style>

  <style type="text/css">
    .gsmsc-mapDiv {
      height : 400px;
    }

    .gsmsc-idleMapDiv {
      height : 400px;
    }

    #mapsearch {
      width : 700px;
      margin: 1px;
      padding: 0px;
    }
  </style>
  <script type="text/javascript">
    function LoadMapSearchControl() {

      var options = {
            zoomControl : GSmapSearchControl.ZOOM_CONTROL_ENABLE_ALL,
            title : "<?php echo $city. ','. $country; ?>",
            url : "",
            idleMapZoom : GSmapSearchControl.ACTIVE_MAP_ZOOM+1,
            activeMapZoom : GSmapSearchControl.ACTIVE_MAP_ZOOM+1
            }

      new GSmapSearchControl(
            document.getElementById("mapsearch"),
            "<?php echo $city. ','. $country; ?>",
            options
            );
    }
    // arrange for this function to be called during body.onload
    // event processing
    GSearch.setOnLoadCallback(LoadMapSearchControl);
  </script>
<!-- ++End Map Search Control Wizard Generated Code++ -->

Answer 1

目前无法通过 API 使用 Transit 层。有一个 高级请求 针对这个问题开放。

Answer 2

在谷歌地图API将让你添加一个图块叠加层到地图，所以：

var tileLayerOverlay = new GTileLayerOverlay(
  new GTileLayer(null, null, null, {
    tileUrlTemplate: 'http://example.com/transit_tiles/{Z}_{X}_{Y}.png', 
    isPng:true,
    opacity:1,
  })
);

map.addOverlay(tileLayerOverlay); 

但是，要做到这一点你需要已经使自己的一套过境瓦片。

顺便提及，谷歌使用其自己的传输层瓦片经由类似方案来检索的：

HTTP：// MLT2 .google.com / mapslt？lyrs =过境＆X = 1310＆Y = 3166＆Z = 13＆W = 256＆H = 256＆GL = US＆HL =烯

所以，你可以这样做：

var gTransitTileUrlTemplate = 'http://mlt1.google.com/mapslt?lyrs=transit&x={X}&y={Y}&z={Z}&w=256&h=256&gl=us&hl=en';

不过，这可能违反了Google地图API的服务条款，并没有保证，谷歌将不会改变这个URL，打破您的应用程序。