Question

II希望用户在GoogleMaps上绘制带折线的路线。我找到了一种捕捉折线的方法（链接中的示例，下面的代码）。代码与Directions服务一起使用以在道路上绘制折线，唯一的问题是这只适用于G_TRAVELMODE_DRIVING但我想使用G_TRAVELMODE_WALKING，当你使用WALKING时，你必须提供地图和方向构造函数中的div宾语。当我这样做时，它会自动删除最后一行，只显示当前行。我已经尝试过几样的事情，例如将地图提供为null，或者在构造函数中省略地图..我还试图在构造函数中给出第二个地图，从路线服务获取折线并在右边显示它们地图。但没有任何作用！如果有人能帮助我，我会很感激！

http://econym.org.uk/gmap/example_snappath.htm

if (GBrowserIsCompatible()) {

  var map = new GMap2(document.getElementById("map"));
  map.setCenter(new GLatLng(53.7877, -2.9832),13)
  map.addControl(new GLargeMapControl());
  map.addControl(new GMapTypeControl());
  var dirn = new GDirections();

  var firstpoint = true;
  var gmarkers = [];
  var gpolys = [];
  var dist = 0;


  GEvent.addListener(map, "click", function(overlay,point) {
    // == When the user clicks on a the map, get directiobns from that point to itself ==
    if (!overlay) {
      if (firstpoint) {
        dirn.loadFromWaypoints([point.toUrlValue(6),point.toUrlValue(6)],{getPolyline:true});
      } else {
        dirn.loadFromWaypoints([gmarkers[gmarkers.length-1].getPoint(),point.toUrlValue(6)],{getPolyline:true});
      }
    }
  });

  // == when the load event completes, plot the point on the street ==
  GEvent.addListener(dirn,"load", function() {
    // snap to last vertex in the polyline
    var n = dirn.getPolyline().getVertexCount();
    var p=dirn.getPolyline().getVertex(n-1);
    var marker=new GMarker(p);
    map.addOverlay(marker);
    // store the details
    gmarkers.push(marker);
    if (!firstpoint) {
      map.addOverlay(dirn.getPolyline());
      gpolys.push(dirn.getPolyline());
      dist += dirn.getPolyline().Distance();
      document.getElementById("distance").innerHTML="Path length: "+(dist/1000).toFixed(2)+" km. "+(dist/1609.344).toFixed(2)+" miles.";
    }
    firstpoint = false;
  });

  GEvent.addListener(dirn,"error", function() {
    GLog.write("Failed: "+dirn.getStatus().code);
  });

}
else {
  alert("Sorry, the Google Maps API is not compatible with this browser");
}

Answer 1

我知道它是一个旧帖子，但由于没有答案，我最近一直在研究这种代码（并使其正常工作），尝试用这个交换addListener。

GEvent.addListener(map, "click", function(overlay,point) {
    // == When the user clicks on a the map, get directiobns from that point to itself ==
    if (!overlay) {   
      if (firstpoint) {
        dirn1.loadFromWaypoints([point.toUrlValue(6),point.toUrlValue(6)],{ getPolyline:true,travelMode:G_TRAVEL_MODE_WALKING});
      } else {
        dirn1.loadFromWaypoints([gmarkers[gmarkers.length-1].getPoint(),point.toUrlValue(6)],{ getPolyline:true,travelMode:G_TRAVEL_MODE_WALKING});
      }
    }
  });

如何在Google地图中使用行走旅行模式将折线捕捉到道路？

1 个答案: