折线使用谷歌地图api

折线使用谷歌地图api

本文介绍了折线使用谷歌地图api v3捕捉道路的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

在google maps api v2中很简单,

  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;

// ==当用户点击地图时,从该点获取directiobns到自己==

gmarkers.push(new google.maps.LatLng(53.7877 ,-2.9832));
gmarkers.push(new google.maps.LatLng(53.9007,-2.9832));
gmarkers.push(新GLatLng(53.600,-2.700));


$ b for(var i = 0; i console.log(gmarkers [i]);
dirn.loadFromWaypoints([gmarkers [i] .toUrlValue(6),gmarkers [i + 1] .toUrlValue(6)],{getPolyline:true});

}


// ==当加载事件完成时,绘制街道上的点==
GEvent.addListener(dirn,加载,function(){
//捕捉多段线中的最后一个顶点
var n = dirn.getPolyline()。getVertexCount();
map.addOverlay(dirn.getPolyline() );
gpolys.push(dirn.getPolyline());
dist + = dirn.getPolyline()。getDistance();
document.getElementById(distance)。innerHTML =路径长度:+(dist / 1000).toFixed(2)+km。+(dist / 1609.344).toFixed(2)+miles。;
});
GEvent.addListener(dirn,error,function(){
GLog.write(Failed:+ dirn.getStatus()。code);
});
console.log(dirn);

在google api V3中,这种方式简单并不起作用。有一些像方向服务,但我没有任何想法,我怎么能通过我的点绘制折线和折线将被收购。

您与路线服务处于正确的轨道上。以下是示例代码:

  var map,path = new google.maps.MVCArray(),
service = new google .maps.DirectionsService(),poly;

函数Init(){
var myOptions = {
zoom:17,
center:new google.maps.LatLng(37.2008385157313,-93.2812106609344),
mapTypeId:google.maps.MapTypeId.HYBRID,
mapTypeControlOptions:{
mapTypeIds:[google.maps.MapTypeId.ROADMAP,google.maps.MapTypeId.HYBRID,
google.maps。 MapTypeId.SATELLITE]
},
disableDoubleClickZoom:true,
scrollwheel:false,
draggableCursor:crosshair
}

map =新的google.maps.Map(document.getElementById(map_canvas),myOptions);
poly = new google.maps.Polyline({map:map});
google.maps.event.addListener(map,click,function(evt){
if(path.getLength()=== 0){
path.push(evt。 latLng);
poly.setPath(path);
} else {
service.route({
origin:path.getAt(path.getLength() - 1),
destination:evt.latLng,
travelMode:google.maps.DirectionsTravelMode.DRIVING
},function(result,status){
if(status == google.maps.DirectionsStatus。 OK){
for(var i = 0,len = result.routes [0] .overview_path.length;
i path.push(result.routes [ 0] .overview_path [i]);
}
}
});
}
});
}

另请参见我的工作示例:


In google maps api v2 it was easy,

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;

// == When the user clicks on a the map, get directiobns from that point to itself ==

gmarkers.push(new google.maps.LatLng(53.7877, -2.9832));
gmarkers.push(new google.maps.LatLng(53.9007, -2.9832));
gmarkers.push(new GLatLng(53.600, -2.700));



for (var i = 0; i < gmarkers.length-1; i++) {
    console.log(gmarkers[i]);
                dirn.loadFromWaypoints([gmarkers[i].toUrlValue(6),gmarkers[i+1].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();
            map.addOverlay(dirn.getPolyline());
            gpolys.push(dirn.getPolyline());
            dist += dirn.getPolyline().getDistance();
            document.getElementById("distance").innerHTML="Path length: "+(dist/1000).toFixed(2)+" km. "+(dist/1609.344).toFixed(2)+" miles.";
           });
    GEvent.addListener(dirn,"error", function() {
        GLog.write("Failed: "+dirn.getStatus().code);
    });
console.log(dirn);

In google api V3 this way simple doesnt work. There is something like directions service but I dont have any idea how I can draw polyline through my points and polyline will be snaped to road.

解决方案

You were on the right track with the directions service. Here's sample code:

var map, path = new google.maps.MVCArray(),
    service = new google.maps.DirectionsService(), poly;

function Init() {
  var myOptions = {
    zoom: 17,
    center: new google.maps.LatLng(37.2008385157313, -93.2812106609344),
    mapTypeId: google.maps.MapTypeId.HYBRID,
    mapTypeControlOptions: {
      mapTypeIds: [google.maps.MapTypeId.ROADMAP, google.maps.MapTypeId.HYBRID,
          google.maps.MapTypeId.SATELLITE]
    },
    disableDoubleClickZoom: true,
    scrollwheel: false,
    draggableCursor: "crosshair"
  }

  map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
  poly = new google.maps.Polyline({ map: map });
  google.maps.event.addListener(map, "click", function(evt) {
    if (path.getLength() === 0) {
      path.push(evt.latLng);
      poly.setPath(path);
    } else {
      service.route({
        origin: path.getAt(path.getLength() - 1),
        destination: evt.latLng,
        travelMode: google.maps.DirectionsTravelMode.DRIVING
      }, function(result, status) {
        if (status == google.maps.DirectionsStatus.OK) {
          for (var i = 0, len = result.routes[0].overview_path.length;
              i < len; i++) {
            path.push(result.routes[0].overview_path[i]);
          }
        }
      });
    }
  });
}

Also, see my working example: http://people.missouristate.edu/chadkillingsworth/mapsexamples/snaptoroad.htm

这篇关于折线使用谷歌地图api v3捕捉道路的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-21 06:11