Question

我在数据库上有2个点的纬度和经度，我希望我的谷歌地图显示从A点到B点的路线......

就像我们看到here（谷歌地图方向）

一样

如何在地图上绘制方向线？

Answer 1

使用Google Maps API v3的directions service。它与Directions API基本相同，但很好地包含在Google Maps API中，它还提供了在地图上轻松渲染路线的便捷方式。

有关在地图上呈现路线路线的信息和示例，请参阅Google Maps API v3文档的rendering directions section。

Answer 2

使用Javascript

我创建了一个工作演示，演示如何通过

在Javascript中使用Google Maps API路线服务

DirectionsService反对发送和接收方向请求的对象
DirectionsRenderer对象在地图上呈现返回的路线

＆＃13;

function initMap() {
  var pointA = new google.maps.LatLng(51.7519, -1.2578),
    pointB = new google.maps.LatLng(50.8429, -0.1313),
    myOptions = {
      zoom: 7,
      center: pointA
    },
    map = new google.maps.Map(document.getElementById('map-canvas'), myOptions),
    // Instantiate a directions service.
    directionsService = new google.maps.DirectionsService,
    directionsDisplay = new google.maps.DirectionsRenderer({
      map: map
    }),
    markerA = new google.maps.Marker({
      position: pointA,
      title: "point A",
      label: "A",
      map: map
    }),
    markerB = new google.maps.Marker({
      position: pointB,
      title: "point B",
      label: "B",
      map: map
    });

  // get route from A to B
  calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB);

}



function calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB) {
  directionsService.route({
    origin: pointA,
    destination: pointB,
    travelMode: google.maps.TravelMode.DRIVING
  }, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}

initMap();

＆＃13;

    html,
    body {
      height: 100%;
      margin: 0;
      padding: 0;
    }
    #map-canvas {
      height: 100%;
      width: 100%;
    }

＆＃13;

<script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>

<div id="map-canvas"></div>

＆＃13;

同样在Jsfiddle：http://jsfiddle.net/user2314737/u9no8te4/

使用Google Maps Web Services

您可以使用发出如下请求的API_KEY来使用Web服务：

https://maps.googleapis.com/maps/api/directions/json?origin=Toronto&destination=Montreal&key=API_KEY

可以在Google Developer Console中获取API_KEY，每天可以获得2,500个免费请求。

请求可以返回可用于在地图上绘制路径的JSON或XML结果。

使用Google Maps Directions API的Web服务官方文档为here

Answer 3

在您的情况下，这是使用directions service的实现。

function displayRoute() {

    var start = new google.maps.LatLng(28.694004, 77.110291);
    var end = new google.maps.LatLng(28.72082, 77.107241);

    var directionsDisplay = new google.maps.DirectionsRenderer();// also, constructor can get "DirectionsRendererOptions" object
    directionsDisplay.setMap(map); // map should be already initialized.

    var request = {
        origin : start,
        destination : end,
        travelMode : google.maps.TravelMode.DRIVING
    };
    var directionsService = new google.maps.DirectionsService(); 
    directionsService.route(request, function(response, status) {
        if (status == google.maps.DirectionsStatus.OK) {
            directionsDisplay.setDirections(response);
        }
    });
}

Answer 4

使用directions API。

拨打ajax电话，即

https://maps.googleapis.com/maps/api/directions/json?parameters

然后解析响应

Answer 5

  // First Initiate your map. Tie it to some ID in the HTML eg. 'MyMapID'
  var map = new google.maps.Map(
    document.getElementById('MyMapID'),
    {
      center: {
        lat: Some.latitude,
        lng: Some.longitude
      }
    }
  );
  // Create a new directionsService object.
  var directionsService = new google.maps.DirectionsService;
    directionsService.route({
      origin: origin.latitude +','+ origin.longitude,
      destination: destination.latitude +','+ destination.longitude,
      travelMode: 'DRIVING',
    }, function(response, status) {
      if (status === google.maps.DirectionsStatus.OK) {
        var directionsDisplay = new google.maps.DirectionsRenderer({
          suppressMarkers: true,
          map: map,
          directions: response,
          draggable: false,
          suppressPolylines: true, 
          // IF YOU SET `suppressPolylines` TO FALSE, THE LINE WILL BE
          // AUTOMATICALLY DRAWN FOR YOU.
        });

        // IF YOU WISH TO APPLY USER ACTIONS TO YOUR LINE YOU NEED TO CREATE A 
        // `polyLine` OBJECT BY LOOPING THROUGH THE RESPONSE ROUTES AND CREATING A 
        // LIST
        pathPoints = response.routes[0].overview_path.map(function (location) {
          return {lat: location.lat(), lng: location.lng()};
        });

        var assumedPath = new google.maps.Polyline({
         path: pathPoints, //APPLY LIST TO PATH
         geodesic: true,
         strokeColor: '#708090',
         strokeOpacity: 0.7,
         strokeWeight: 2.5
       });

       assumedPath.setMap(map); // Set the path object to the map

Answer 6

我正在使用弹出窗口在新窗口中显示地图。我正在使用以下网址

https://www.google.com/maps?z=15&daddr=LATITUDE,LONGITUDE

HTML片段

<a target='_blank' href='https://www.google.com/maps?z=15&daddr=${location.latitude},${location.longitude}'>Calculate route</a>

Google Maps API V3：如何显示从A点到B点（蓝线）的方向？

6 个答案:

使用Javascript

使用Google Maps Web Services