Question

我有问题之分,说明如何把整个街道放在与APIC的角图上。同我一样,我要就我网站上的地图上的具体道路提供一些数据,我如何能够使这条道路变成一个反映数据的具体颜色?

Answer 1

基本办法是利用谷歌地图的标语绘制地图中两个任意街道点之间的路线。这些要点必须与其LatLng坐标编码。这里就是一个法典例子(如APICV2所示):

function initMap() {  // called by page onload event
  if (GBrowserIsCompatible()) {
    // set the initial location 
    gMap = new GMap2(document.getElementById("map_canvas"));
    gMap.addControl(new GLargeMapControl());
    gMap.setCenter(GLatLng(49.238326, 6.977761), 15);
// init directions object and attach listener to handle route loads from function     highliteRoute()
    gDir = new GDirections();
    gPoly = null;
    GEvent.addListener(gDir,  load , function(){
      gPoly = gDir.getPolyline();
      gMap.addOverlay(gPoly);

      // zoom & pan to poly        
      var polyBds  = gPoly.getBounds();
      var polyZoom = gMap.getBoundsZoomLevel(polyBds);
      gMap.setZoom(polyZoom);
      gMap.panTo(polyBds.getCenter());
    });
  }
}

function highliteRoute(){
  if(gPoly!=null)  gPoly.hide();
  gDir.load( from: 49.313530,6.969109 to: 49.238326,6.977761 , {getPolyline:true});
}

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