{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "GeoJSON object",
    "description": "Schema for a GeoJSON object",
    "type": "object",
    "required": [ "type" ],
    "oneOf": [
        { "$ref": "#/definitions/geometry" },
        { "$ref": "#/definitions/geometryCollection" },
        { "$ref": "#/definitions/feature" },
        { "$ref": "#/definitions/featureCollection" }
    ],
    "definitions": {
        "geometry": {
            "title": "geometry",
            "description": "One geometry as defined by GeoJSON",
            "type": "object",
            "required": [ "type", "coordinates" ],
            "oneOf": [
                {
                    "title": "Point",
                    "properties": {
                        "type": { "enum": [ "Point" ] },
                        "coordinates": { "$ref": "#/definitions/geometry/definitions/position" }
                    }
                },
                {
                    "title": "MultiPoint",
                    "properties": {
                        "type": { "enum": [ "MultiPoint" ] },
                        "coordinates": { "$ref": "#/definitions/geometry/definitions/positionArray" }
                    }
                },
                {
                    "title": "LineString",
                    "properties": {
                        "type": { "enum": [ "LineString" ] },
                        "coordinates": { "$ref": "#/definitions/geometry/definitions/lineString" }
                    }
                },
                {
                    "title": "MultiLineString",
                    "properties": {
                        "type": { "enum": [ "MultiLineString" ] },
                        "coordinates": {
                            "type": "array",
                            "items": { "$ref": "#/definitions/geometry/definitions/lineString" }
                        }
                    }
                },
                {
                    "title": "Polygon",
                    "properties": {
                        "type": { "enum": [ "Polygon" ] },
                        "coordinates": { "$ref": "#/definitions/geometry/definitions/polygon" }
                    }
                },
                {
                    "title": "MultiPolygon",
                    "properties": {
                        "type": { "enum": [ "MultiPolygon" ] },
                        "coordinates": {
                            "type": "array",
                            "items": { "$ref": "#/definitions/geometry/definitions/polygon" }
                        }
                    }
                }
            ],
            "definitions": {
                "position": {
                    "description": "A single position",
                    "type": "array",
                    "minItems": 2,
                    "items": [ { "type": "number" }, { "type": "number" } ],
                    "additionalItems": false
                },
                "positionArray": {
                    "description": "An array of positions",
                    "type": "array",
                    "minItems": 2,
                    "items": { "$ref": "#/definitions/geometry/definitions/position" }
                },
                "lineString": {
                    "description": "An array of two or more positions",
                    "allOf": [
                        { "$ref": "#/definitions/geometry/definitions/positionArray" },
                        { "minItems": 2 }
                    ]
                },
                "linearRing": {
                    "description": "An array of four positions where the first equals the last",
                    "allOf": [
                        { "$ref": "#/definitions/geometry/definitions/positionArray" },
                        { "minItems": 4 }
                    ]
                },
                "polygon": {
                    "description": "An array of linear rings",
                    "type": "array",
                    "items": { "$ref": "#/definitions/geometry/definitions/linearRing" }
                }
            }
        },
        "geometryCollection": {
            "title": "GeometryCollection",
            "description": "A collection of geometry objects",
            "required": [ "geometries" ],
            "properties": {
                "type": { "enum": [ "GeometryCollection" ] },
                "geometries": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/geometry" }
                }
            }
        },
        "feature": {
            "title": "Feature",
            "description": "A Geo JSON feature object",
            "required": [ "geometry", "properties" ],
            "properties": {
                "type": { "enum": [ "Feature" ] },
                "geometry": {
                    "oneOf": [
                        { "type": "null" },
                        { "$ref": "#/definitions/geometry" }
                    ]
                },
                "properties": { "type": [ "object", "null" ] }
            }
        },
        "featureCollection": {
            "title": "FeatureCollection",
            "description": "A Geo JSON feature collection",
            "required": [ "features" ],
            "properties": {
                "type": { "enum": [ "FeatureCollection" ] },
                "features": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/feature" }
                }
            }
        }
    }
}