{
  "description": "Observed area of the group route in the coordinate system of its reference frame",
  "type": "object",
  "required": [
    "shape",
    "observedAt"
  ],
  "properties": {
    "shape": {
      "description": "Area covered by a group route, as a polygon or multi-polygon",
      "oneOf": [
        {
          "type": "object",
          "description": "GeoJSON-like polygon: an exterior ring followed by optional interior rings (holes)",
          "required": [
            "type",
            "coordinates"
          ],
          "properties": {
            "type": {
              "type": "string",
              "enum": [
                "Polygon"
              ]
            },
            "coordinates": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "array",
                "description": "A closed ring of positions; the first and last positions are equal (GeoJSON linear ring)",
                "minItems": 4,
                "items": {
                  "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": "SpatialPolygon"
        },
        {
          "type": "object",
          "description": "GeoJSON-like multi-polygon: a list of polygons, each a list of rings",
          "required": [
            "type",
            "coordinates"
          ],
          "properties": {
            "type": {
              "type": "string",
              "enum": [
                "MultiPolygon"
              ]
            },
            "coordinates": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "array",
                "minItems": 1,
                "items": {
                  "$ref": "#/properties/shape/oneOf/0/properties/coordinates/items"
                }
              }
            }
          },
          "additionalProperties": false,
          "title": "SpatialMultiPolygon"
        }
      ],
      "discriminator": {
        "propertyName": "type",
        "mapping": {
          "Polygon": "SpatialPolygon.yaml",
          "MultiPolygon": "SpatialMultiPolygon.yaml"
        }
      }
    },
    "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 geometry"
    }
  },
  "additionalProperties": false
}