{
  "description": "Anchor point of the group route in its reference frame. It is a label anchor, not a navigation target.",
  "type": "object",
  "required": [
    "point",
    "observedAt"
  ],
  "properties": {
    "point": {
      "type": "object",
      "description": "GeoJSON-like point",
      "required": [
        "type",
        "coordinates"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "Point"
          ]
        },
        "coordinates": {
          "type": "array",
          "description": "A position as [x, y] or [x, y, z] in the frame's coordinate system",
          "minItems": 2,
          "maxItems": 3,
          "items": {
            "type": "number"
          }
        }
      },
      "additionalProperties": false,
      "title": "SpatialPoint"
    },
    "relativeToGroupId": {
      "type": "string",
      "description": "Canonical endpoint group whose frame the coordinates use"
    },
    "relativeToGroupRouteId": {
      "type": "string",
      "description": "Provider group route whose coordinate system the coordinates use"
    },
    "observedAt": {
      "type": "string",
      "format": "date-time",
      "description": "When the provider observed this position"
    }
  },
  "additionalProperties": false
}