如何将 GPS 轨迹与道路网络匹配 - Amazon Location Service
潜在使用案例示例

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如何将 GPS 轨迹与道路网络匹配

SnapToRoads API 允许您将 GPS 轨迹与道路网络进行匹配。GPS 轨迹包括使用 GPS 设备记录的位置和元数据（例如时间戳、速度和航向角）。这些轨迹往往具有一定的误差幅度，因此难以直接用于分析和可视化操作。

SnapToRoads 在匹配轨迹时会考虑指定出行模式所涉及的法律和时间限制。如果轨迹明显表明存在违反限制的情况，则会保留实际所走的路线。

潜在使用案例

  • 将 GPS 轨迹叠加到最有可能行驶的道路上：此功能有助于将 GPS 数据与道路网络上最准确的路径对齐，从而实现更清晰的数据可视化效果。

  • 填补 GPS 轨迹中的空缺部分：SnapToRoads 可通过将坐标与路段对齐来填补空缺部分，从而为应用程序创建一个更连续、更有用的数据集。

  • 滤除噪声和异常值：通过与距离最近的道路对齐，此 API 可以帮助剔除异常值并实现 GPS 降噪，从而提高分析数据的可靠性。

示例

Sample request
{
  "TracePoints": [
    {
      "Position": [8.53404,50.16364],
      "Timestamp": "2024-05-22T18:13:42Z"
    },
    {
      "Position": [8.53379056,50.16352417],
      "Speed": 20,
      "Timestamp": "2024-05-22T18:13:59Z"
    }
  ],
  "TravelMode": "Car"
}
Sample response
{
    "Notices": [],
    "SnappedGeometry": {
        "Polyline": "Redacted"
    },
    "SnappedGeometryFormat": "FlexiblePolyline",
    "SnappedTracePoints": [
        {
            "Confidence": 1,
            "OriginalPosition": [8.53404, 50.16364],
            "SnappedPosition": [8.53402, 50.16367]
        },
        {
            "Confidence": 0.86,
            "OriginalPosition": [8.53379056, 50.16352417],
            "SnappedPosition": [8.53375, 50.16356]
        }
    ]
}
cURL
curl --request POST \
  --url 'https://routes.geo.eu-central-1.amazonaws.com/v2/snap-to-roads?key=Your_key' \
  --header 'Content-Type: application/json' \
  --data '{
  "TracePoints": [
    {
      "Position": [8.53404,50.16364],
      "Timestamp": "2024-05-22T18:13:42Z"
    },
    {
      "Position": [8.53379056,50.16352417],
      "Speed": 20,
      "Timestamp": "2024-05-22T18:13:59Z"
    }
  ],
  "TravelMode": "Car"
}'
AWS CLI
aws geo-routes snap-to-roads --key ${YourKey} \
--trace-points '[{"Position": [8.53404, 50.16364], "Timestamp": "2024-05-22T18:13:42Z"}, {"Position": [8.53379056, 50.16352417], "Speed": 20, "Timestamp": "2024-05-22T18:13:59Z"}]' \
--travel-mode "Car"
Sample request
{
  "TracePoints": [
    {
      "Position": [8.53404,50.16364],
      "Timestamp": "2024-05-22T18:13:42Z"
    },
    {
      "Position": [8.53379056,50.16352417],
      "Speed": 20,
      "Timestamp": "2024-05-22T18:13:59Z"
    }
  ],
  "TravelMode": "Truck",
  "TravelModeOptions": {
    "Truck": {
      "GrossWeight": 10000
    }
  }
}
Sample response
{
    "Notices": [],
    "SnappedGeometry": {
        "Polyline": "Redacted"
    },
    "SnappedGeometryFormat": "FlexiblePolyline",
    "SnappedTracePoints": [
        {
            "Confidence": 1,
            "OriginalPosition": [8.53404, 50.16364],
            "SnappedPosition": [8.53402, 50.16367]
        },
        {
            "Confidence": 0.86,
            "OriginalPosition": [8.53379056, 50.16352417],
            "SnappedPosition": [8.53375, 50.16356]
        }
    ]
}
cURL
curl --request POST \
  --url 'https://routes.geo.eu-central-1.amazonaws.com/v2/snap-to-roads?key=Your_key' \
  --header 'Content-Type: application/json' \
  --data '{
  "TracePoints": [
    {
      "Position": [8.53404,50.16364],
      "Timestamp": "2024-05-22T18:13:42Z"
    },
    {
      "Position": [8.53379056,50.16352417],
      "Speed": 20,
      "Timestamp": "2024-05-22T18:13:59Z"
    }
  ],
  "TravelMode": "Truck",
  "TravelModeOptions": {
    "Truck": {
      "GrossWeight": 10000
    }
  }
}'
AWS CLI
aws geo-routes snap-to-roads --key ${YourKey} \
--trace-points '[{"Position": [8.53404, 50.16364], "Timestamp": "2024-05-22T18:13:42Z"}, {"Position": [8.53379056, 50.16352417], "Speed": 20, "Timestamp": "2024-05-22T18:13:59Z"}]' \
--travel-mode "Truck" \
--travel-mode-options '{"Truck": {"GrossWeight": 10000}}'