这里的地图路线导航指令以米为单位，我的要求是以公里为单位收集所有距离，我不想用从M到KM的简单转换来解决此问题，因为路线响应中包含方向指令，所以我必须将所有指令响应从M转换为KM。
样品响应：
{
"response": {
"metaInfo": {
"timestamp": "2019-06-21T10:50:08Z",
"mapVersion": "8.30.97.151",
"moduleVersion": "7.2.201923-3839",
"interfaceVersion": "2.6.58",
"availableMapVersion": [
"8.30.97.151"
]
},
"route": [
{
"waypoint": [
{
"linkId": "-826632453",
"mappedPosition": {
"latitude": 52.5162041,
"longitude": 13.378365
},
"originalPosition": {
"latitude": 52.5159999,
"longitude": 13.3778999
},
"type": "stopOver",
"spot": 0.5384615,
"sideOfStreet": "right",
"mappedRoadName": "Pariser Platz",
"label": "Pariser Platz",
"shapeIndex": 0,
"source": "user"
},
{
"linkId": "+722940051",
"mappedPosition": {
"latitude": 52.5206638,
"longitude": 13.3861149
},
"originalPosition": {
"latitude": 52.5205999,
"longitude": 13.3861999
},
"type": "stopOver",
"spot": 0.4634146,
"sideOfStreet": "right",
"mappedRoadName": "Reichstagufer",
"label": "Reichstagufer",
"shapeIndex": 15,
"source": "user"
}
],
"mode": {
"type": "fastest",
"transportModes": [
"car"
],
"trafficMode": "enabled",
"feature": []
},
"leg": [
{
"start": {
"linkId": "-826632453",
"mappedPosition": {
"latitude": 52.5162041,
"longitude": 13.378365
},
"originalPosition": {
"latitude": 52.5159999,
"longitude": 13.3778999
},
"type": "stopOver",
"spot": 0.5384615,
"sideOfStreet": "right",
"mappedRoadName": "Pariser Platz",
"label": "Pariser Platz",
"shapeIndex": 0,
"source": "user"
},
"end": {
"linkId": "+722940051",
"mappedPosition": {
"latitude": 52.5206638,
"longitude": 13.3861149
},
"originalPosition": {
"latitude": 52.5205999,
"longitude": 13.3861999
},
"type": "stopOver",
"spot": 0.4634146,
"sideOfStreet": "right",
"mappedRoadName": "Reichstagufer",
"label": "Reichstagufer",
"shapeIndex": 15,
"source": "user"
},
"length": 953,
"travelTime": 234,
"maneuver": [
{
"position": {
"latitude": 52.5162041,
"longitude": 13.378365
},
"instruction": "Head <span class=\"heading\">east</span> on <span class=\"street\">Pariser Platz</span>. <span class=\"distance-description\">Go for <span class=\"length\">119 m</span>.</span>",
"travelTime": 45,
"length": 119,
"id": "M1",
"_type": "PrivateTransportManeuverType"
},
{
"position": {
"latitude": 52.5162792,
"longitude": 13.3795345
},
"instruction": "Continue on <span class=\"next-street\">Unter den Linden</span>. <span class=\"distance-description\">Go for <span class=\"length\">90 m</span>.</span>",
"travelTime": 55,
"length": 90,
"id": "M2",
"_type": "PrivateTransportManeuverType"
},
{
"position": {
"latitude": 52.5163651,
"longitude": 13.3808541
},
"instruction": "Turn <span class=\"direction\">left</span> onto <span class=\"next-street\">Wilhelmstraße</span> <span class=\"number\">(B2)</span>. <span class=\"distance-description\">Go for <span class=\"length\">193 m</span>.</span>",
"travelTime": 40,
"length": 193,
"id": "M3",
"_type": "PrivateTransportManeuverType"
},
{
"position": {
"latitude": 52.5180817,
"longitude": 13.3804572
},
"instruction": "Continue on <span class=\"next-street\">Wilhelmstraße</span>. <span class=\"distance-description\">Go for <span class=\"length\">95 m</span>.</span>",
"travelTime": 20,
"length": 95,
"id": "M4",
"_type": "PrivateTransportManeuverType"
},
{
"position": {
"latitude": 52.5189292,
"longitude": 13.3802962
},
"instruction": "Turn <span class=\"direction\">right</span> onto <span class=\"next-street\">Reichstagufer</span>. <span class=\"distance-description\">Go for <span class=\"length\">447 m</span>.</span>",
"travelTime": 73,
"length": 447,
"id": "M5",
"_type": "PrivateTransportManeuverType"
},
{
"position": {
"latitude": 52.5206638,
"longitude": 13.3861149
},
"instruction": "Arrive at <span class=\"street\">Reichstagufer</span>. Your destination is on the right.",
"travelTime": 1,
"length": 9,
"id": "M6",
"_type": "PrivateTransportManeuverType"
}
]
}
],
"summary": {
"distance": 953,
"trafficTime": 234,
"baseTime": 215,
"flags": [
"noThroughRoad",
"builtUpArea"
],
"text": "The trip takes <span class=\"length\">953 m</span> and <span class=\"time\">4 mins</span>.",
"travelTime": 234,
"_type": "RouteSummaryType"
}
}
],
"language": "en-us"
}
}