Mapbox方向:如何从结果中提取方向数据

时间:2016-03-26 13:45:02

标签: javascript mapbox directions

我在javascript应用程序中使用Mapbox Directions来成功地将几何体和路由数据(在两个纬度/长度对之间)返回到浏览器。我试图显示 - 最终 - 在地图上连接它们的路线折线,但即使数据存在,我也无法从结果对象访问路线数据。

以下是请求代码:

L.mapbox.accessToken ='pk.eyJ1Ij...9Uk_Z8JqMOQ';
L.mapbox.id = 'tom...ibb';
var startLatLng = L.latLng(38.935899, -77.022353);
var endLatLng = L.latLng(38.90, -77.10);
var directions = L.mapbox.directions();
directions.setOrigin(startLatLng);
directions.setDestination(endLatLng);
var route = directions.query();
console.dir(route);

请注意console.dir行。这就是我在控制台中看到的路由:

_initHooksCalled:true
_query:null
_requests:Array[0]
_waypoints:Array[0]
destination:Object
directions:Object
options:Object
origin:Object

这是我在控制台中看到的route.destination,route.options和route.origin对象:

    console.log(route.destination);
      => Object {type: "Feature", geometry: Object, properties:...
    console.log(route.origin);
      => Object {type: "Feature", geometry: Object, properties:...
    console.log(route.options);
      => Object {units: "imperial"}

但是当我尝试查看route.directions时,它是未定义的。

    console.log(route.directions);
      => undefined

当"开放"控制台中的整个路由对象(通过console.dir)我看到了我要查找的路线数据:

    directions:Object
        destination:Object
        origin:Object
        routes:Array[2]
            0:Object
                distance:10460
                duration:862
                geometry:Object
                steps:Array[26]
                ...

为什么这会是"未定义"当使用route.directions访问它时,特别是当我可以看到其他"子对象"的内容时(例如route.options)使用相同的点语法?

最后,当我" stringify"路线对象var routeJson = JSON.stringify(route);我看到了:

    {"options":{
        "units":"imperial"
    },
    "_waypoints":[],
    "_initHooksCalled":true,
    "origin":{
        "type":"Feature",
        "geometry":{
            "type":"Point",
            "coordinates":[-77.022353,38.935899]
        },
        "properties":{"query":[-77.022353,38.935899]}
    },
    "destination":{
        "type":"Feature",
        "geometry":{
            "type":"Point",
            "coordinates":[-77.1,38.9]},
        "properties":{"query":[-77.1,38.9]}
    },
    "_requests":[],
    "_query":{}}

再次,没有指示内容!任何想法都将不胜感激!

1 个答案:

答案 0 :(得分:0)

您在哪里找到具有query功能的API?根据{{​​3}},您应该这样称呼它:

var mapboxClient = new MapboxClient('ACCESSTOKEN');
mapboxClient.getDirections(
  [
    { latitude: 33.6, longitude: -95.4431 },
    { latitude: 33.2, longitude: -95.4431 } ],
  function(err, res) {
  // res is a document with directions
});

// With options
mapboxClient.getDirections([
  { latitude: 33.6875431, longitude: -95.4431142 },
  { latitude: 33.6875431, longitude: -95.4831142 }
], {
  profile: 'mapbox.walking',
  instructions: 'html',
  alternatives: false,
  geometry: 'polyline'
}, function(err, results) {
  console.log(results.origin);
});

我怀疑传递geometry: 'polyline是您需要确保在响应中包含几何信息所需的。