如何通过HERE API获取各途经点之间的距离？

Hey there! Let's break down how to grab the exact distances for your two route segments (waypoint0 → waypoint1 and waypoint1 → waypoint2) using the HERE Route API.

Your current request is already close — you've included sm (summary data) in routeAttributes, which is key. The main tweak you need is to adjust the legAttributes parameter to get per-segment details instead of just total route info.

Updated Request #

Change legAttributes=none to legAttributes=li,sm (this enables leg information and leg-specific summaries). Here's your modified request string:

https://tce.cit.api.here.com/2/calculateroute.json?mode=fastest;truck;traffic:disabled&truckType=tractorTruck&maneuverAttributes=none&combineChange=true&routeAttributes=none,wp,sm,sh,no&linkAttributes=none&legAttributes=li,sm&detail=1&alternatives=2&rollup=total,country&jsonattributes=41&waypoint0=geo!stopOver!53.55155000,9.99960000&waypoint1=geo!passThrough!45.97279231,4.73305852&waypoint2=geo!stopOver!41.15305000,-8.57573000

What This Changes #

• With legAttributes=li,sm, the API will return a legs array in the JSON response. Each entry in this array corresponds to one segment between your waypoints.
• Inside each leg object, you'll find a summary field that includes the distance (in meters by default) for that specific segment, along with travel time and other relevant metrics.

Example Response Snippet #

Here's a simplified look at what you'll get for the legs section:

"legs": [
  {
    "summary": {
      "distance": 895678,
      "travelTime": 37260
      // Additional summary details will appear here
    }
  },
  {
    "summary": {
      "distance": 789123,
      "travelTime": 32100
      // Additional summary details will appear here
    }
  }
]

The first leg's distance is for waypoint0 → waypoint1, and the second is for waypoint1 → waypoint2.

A quick note: since waypoint1 is marked as passThrough, the API still recognizes it as a split point for legs when you enable legAttributes=li,sm, so you'll get the exact segment distances you need.

Hope this solves your problem — let me know if you need further clarification! 😊

内容的提问来源于stack exchange，提问作者cslehel