如何使用谷歌方向 API 优化路线

Question

我正在使用google direction api来解决旅行商问题。

显然，该 api 接受一个名为 optimize:true 的参数，然后返回一个 "waypoint_order": [ 1, 0, 2, 3 ]，告诉您优化路线的最佳航点顺序。

问题是，当您尝试优化路线时，API 不起作用并且您得到 NO_RESULTS。

例如，使用此 url 查看添加 optimize:true| 位时 API 是如何失败的。

不工作（NO_RESULTS 错误）：

https://maps.googleapis.com/maps/api/directions/json?origin=place_id:ChIJdd4hrwug2EcRmSrV3Vo6llI&destination=place_id:ChIJh1a5WhEMa0gRY1JU4PEam8Q&waypoints=optimize:true|place_id:ChIJPeqVDlONbEgRk4X1zrUsKDs|place_id:ChIJ_WegsaCYc0gRlCypaxXgLjs|&key=YOUR_KEY

工作（但未优化）：

不优化网址：https://maps.googleapis.com/maps/api/directions/json?origin=place_id:ChIJdd4hrwug2EcRmSrV3Vo6llI&destination=place_id:ChIJh1a5WhEMa0gRY1JU4PEam8Q&waypoints=place_id:ChIJPeqVDlONbEgRk4X1zrUsKDs|place_id:ChIJ_WegsaCYc0gRlCypaxXgLjs|&key=YOUR_KEY

有谁知道他们是否停止支持路线优化？

谢谢

Answer 1

在我看来，当您传入 PlaceIds 时，这是 DirectionsService 中的一个错误。我用 Javascript API 复制了它。使用地址有效：

  waypts = [];
  waypts.push({
  location: "Plymouth, UK", // {placeId:"ChIJPeqVDlONbEgRk4X1zrUsKDs"},
  stopover: true
  });
  waypts.push({
  location: "Bournemouth, UK", // {placeId:"ChIJ_WegsaCYc0gRlCypaxXgLjs"},
  stopover: true
  });
  var request = {
    origin: "London, UK", //{placeId:"ChIJdd4hrwug2EcRmSrV3Vo6llI"},
    destination: "Newquay, UK", //{placeId: "ChIJh1a5WhEMa0gRY1JU4PEam8Q"},
    waypoints: waypts,
    optimizeWaypoints: true,
    travelMode: 'DRIVING'
  };

fiddle using addresses (returns waypoint order=1,0)

但是相同的位置（我使用这些 placeIds 来获取上面的地址）不能使用 placeIds：

  waypts = [];
  waypts.push({
  location: {placeId:"ChIJPeqVDlONbEgRk4X1zrUsKDs"},
  stopover: true
  });
  waypts.push({
  location: {placeId:"ChIJ_WegsaCYc0gRlCypaxXgLjs"},
  stopover: true
  });
  var request = {
    origin: {placeId:"ChIJdd4hrwug2EcRmSrV3Vo6llI"},
    destination: {placeId: "ChIJh1a5WhEMa0gRY1JU4PEam8Q"},
    waypoints: waypts,
    optimizeWaypoints: true,
    travelMode: 'DRIVING'
  };

fiddle using placeId (returns ZERO_RESULTS)

可能在问题跟踪器中与此问题相关：Issue 8979: Bug: Can't use combination of placeId and String for origin/destination