将 waypoints 添加到 Google 距离矩阵以确定里程

Question

我使用 Google 的地图距离矩阵创建了一个 simple jsfiddle here 来确定两点之间的距离。这工作正常，但后来我有兴趣确定超过 2 点之间的里程数。但是我无法在这方面走得太远，因为我认为我没有正确实施它。有谁知道如何将 waypoints 添加到 Google 的距离矩阵以确定它们之间的最佳 route/mileage 乘车？例如，如果我想通过其他一些地方从 The Underpass, Birmingham 到达 8 Shandon Close, Birmingham。我的代码已包含在下面：

var origin = "The Underpass, Marston Green, Birmingham, West Midlands B40 1PA, UK",
    destinations = ["8 Shandon Close, Birmingham, West Midlands B32 3XB, UK","2 The Osiers, Elford, Tamworth, Staffordshire B79 9DG, UK","170 Bells Lane, Birmingham, West Midlands B14 5QA, UK","246 Long Acre, Birmingham, West Midlands B7 5JP, UK","28 Cuthbert Road, Birmingham, West Midlands B18 4AG, UK"]
    service = new google.maps.DistanceMatrixService();

service.getDistanceMatrix({
    origins: [origin],
    destinations: destinations,
    travelMode: google.maps.TravelMode.DRIVING,
    avoidHighways: false,
    avoidTolls: false,
    unitSystem: google.maps.UnitSystem.IMPERIAL
},
callback);

function callback(response, status) {
    var orig = document.getElementById("orig"),
        dest = document.getElementById("dest"),
        dist = document.getElementById("dist");

    if (status == "OK") {
        orig.value = response.originAddresses[0];
        dest.value = response.destinationAddresses[0];
        dist.value = response.rows[0].elements[0].distance.text;
    } else {
        alert("Error: " + status);
    }
}

Answer 1

来自documentation for the Distance Matrix

Google's Distance Matrix service computes travel distance and journey duration between multiple origins and destinations using a given mode of travel.

This service does not return detailed route information. Route information, including polylines and textual directions, can be obtained by passing the desired single origin and destination to the Directions Service.

如果您需要通过一组（小于 8 个）waypoints 计算 2 个地点之间的距离，请使用 directions service

var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;

function initialize() {
  directionsDisplay = new google.maps.DirectionsRenderer();
  var chicago = new google.maps.LatLng(41.850033, -87.6500523);
  var mapOptions = {
    zoom: 7,
    center: chicago
  };
  map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
  directionsDisplay.setMap(map);
  calcRoute();
}

var origin = "The Underpass, Marston Green, Birmingham, West Midlands B40 1PA, UK",
  destinations = ["8 Shandon Close, Birmingham, West Midlands B32 3XB, UK", "2 The Osiers, Elford, Tamworth, Staffordshire B79 9DG, UK", "170 Bells Lane, Birmingham, West Midlands B14 5QA, UK", "246 Long Acre, Birmingham, West Midlands B7 5JP, UK", "28 Cuthbert Road, Birmingham, West Midlands B18 4AG, UK"]


service = new google.maps.DistanceMatrixService();

function calcRoute() {
  var waypts = [];
  for (var i = 1; i < destinations.length - 1; i++) {
    waypts.push({
      location: destinations[i],
      stopover: true
    });
  }
  var request = {
    origin: origin,
    destination: destinations[destinations.length - 1],
    waypoints: waypts,
    optimizeWaypoints: true,
    travelMode: google.maps.TravelMode.DRIVING
  };
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      var orig = document.getElementById("orig"),
        dest = document.getElementById("dest"),
        dist = document.getElementById("dist");

      orig.value = response.routes[0].legs[0].start_address;
      dest.value = response.routes[0].legs[3].end_address;
      var total_distance = 0.0;
      for (var i=0; i<response.routes[0].legs.length; i++) {
        total_distance += response.routes[0].legs[i].distance.value;
        }
      dist.value = total_distance +" meters";
    }
  });
}


google.maps.event.addDomListener(window, 'load', initialize);

html,
body,
#map-canvas {
  height: 100%;
  margin: 0px;
  padding: 0px
}
#panel {
  position: absolute;
  top: 5px;
  left: 50%;
  margin-left: -180px;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;

<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="map-canvas"></div>
<div id="mileage-details">Origin:
  <input id="orig" type="text" style="width:35em">
  <br>
  <br>Destination:
  <input id="dest" type="text" style="width:35em">
  <br>
  <br>Distance:
  <input id="dist" type="text" style="width:35em">
</div>

将 waypoints 添加到 Google 距离矩阵以确定里程

Adding waypoints to Google Distance Matrix to determine mileage

javascript

google-maps