{
    "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
}