如何使用此处 API 从 link id 获取道路 link 数据

How to get roadlink data from link id using HERE API

给定一个 LinkId,我想使用 HERE REST API 检索相应的道路 link 数据。

我用路由API得到了道路link的坐标id(最近的道路link是return,这就是我想要的),但由于它是一条路线 API,它只是 return 这条道路 link 上的最近点,而不是实际道路 link 本身。我需要整条道路 link 几何图形,而且我不想指定图块和地图特定数据。

API 获取请求:https://route.api.here.com/routing/7.2/calculateroute.json?mode=fastest;car;traffic:enabled&routeAttributes=shape,incidents&departure=now&legAttributes=all&app_id={APP ID}&app_code={APP CODE}&waypoint0=57.69935469580243,11.987510919570923&waypoint1=57.69935469580243,11.987510919570923&linkAttributes=all&jsonAttributes=128&maneuverAttributes=all

产生:

{
    "MetaInfo": {
        ...
    },
    "Route": [
        {
            "Waypoint": [
                {
                    "LinkId": "+833889589",
                    "MappedPosition": {
                        "Latitude": 57.6992619,
                        "Longitude": 11.9864917
                    },
                    "OriginalPosition": {
                        "Latitude": 57.6993547,
                        "Longitude": 11.9875109
                    },
                    ...
                },
                {
                    "LinkId": "+833889589",
                    "MappedPosition": {
                        "Latitude": 57.6992619,
                        "Longitude": 11.9864917
                    },
                    "OriginalPosition": {
                        "Latitude": 57.6993547,
                        "Longitude": 11.9875109
                    },
                    ...
                }
            ],
            "Mode": {
                ...
            },
            "Shape": [
                "57.6992619,11.9864917",
                "57.6992619,11.9864917"
            ],
            "Leg": [
                {
                    "Start": {
                        "LinkId": "+833889589",
                        "MappedPosition": {
                            "Latitude": 57.6992619,
                            "Longitude": 11.9864917
                        },
                        "OriginalPosition": {
                            "Latitude": 57.6993547,
                            "Longitude": 11.9875109
                        },
                        ...
                    "End": {
                        "LinkId": "+833889589",
                        "MappedPosition": {
                            "Latitude": 57.6992619,
                            "Longitude": 11.9864917
                        },
                        "OriginalPosition": {
                            "Latitude": 57.6993547,
                            "Longitude": 11.9875109
                        },
                   ...
                    "Maneuver": [
                        {
                            "Position": {
                                "Latitude": 57.6992619,
                                "Longitude": 11.9864917
                            },
                            ....
                            "Shape": [
                                "57.6992619,11.9864917",
                                "57.6992619,11.9864917"
                            ],
                            ....
                        },
                        {
                            "Position": {
                                "Latitude": 57.6992619,
                                "Longitude": 11.9864917
                            },
                            ....
                        }
                    ],
                    "Link": [
                        {
                            "LinkId": "+833889589",
                            "Shape": [
                                "57.6992619,11.9864917",
                                "57.6992619,11.9864917"
                            ],
                            ....
                    },
                    "Shape": [
                        "57.6992619,11.9864917",
                        "57.6992619,11.9864917"
                    ],
                    ....
}

如您所见,结果包含一个 LinkId(好),但只有一个点 link(坏)。我环顾四周,特别是交通流量 API,以及建议的平台数据扩展 API here

您需要的有关 link ID 的几何信息可以从舰队远程信息处理高级数据集中检索。 HERE 地图数据的 LINK_FC1...5 层将为您提供给定地图区域中所有 link ID 的 link connectivity/geometry 信息。例如,给定一条道路 link ID,您可以得到 REF_NODE_NEIGHBOR_LINKSNONREF_NODE_NEIGHBOR_LINKS 定义如下:

"REF_NODE_NEIGHBOR_LINKS": "Comma seperated list of LINK_IDs that are connected to this link via the reference node. If a LINK_ID is negative ('-') then this link is connected via it's non reference node.", "NONREF_NODE_NEIGHBOR_LINKS": "Comma seperated list of LINK_IDs that are connected to this link via the non reference node. If a LINK_ID is negative ('-') then this link is connected via it's non reference node."

请通读 https://developer.here.com/documentation/platform-data/topics/request-constructing.html 中的文档。