{
  "title": "Navigation Constraint",
  "type": "object",
  "$schema": "http://json-schema.org/draft-04/schema",
  "description": "Object determining whether the camera is constrained to navigate only above, or also under the ground surface.",
  "properties": {
    "type": {
      "type": "string",
      "enum": [
        "none",
        "stayAbove"
      ]
    }
  },
  "required": [
    "type"
  ],
  "additionalProperties": false
}