JSON Schema (v4) for a geometry as defined by GeoJSON

geometry.json

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "id": "http://json-schema.org/geojson/geometry.json#",
    "title": "geometry",
    "description": "One geometry as defined by GeoJSON",
    "type": "object",
    "required": [ "type", "coordinates" ],
    "oneOf": [
        {
            "title": "Point",
            "properties": {
                "type": { "enum": [ "Point" ] },
                "coordinates": { "$ref": "#/definitions/position" }
            }
        },
        {
            "title": "MultiPoint",
            "properties": {
                "type": { "enum": [ "MultiPoint" ] },
                "coordinates": { "$ref": "#/definitions/positionArray" }
            }
        },
        {
            "title": "LineString",
            "properties": {
                "type": { "enum": [ "LineString" ] },
                "coordinates": { "$ref": "#/definitions/lineString" }
            }
        },
        {
            "title": "MultiLineString",
            "properties": {
                "type": { "enum": [ "MultiLineString" ] },
                "coordinates": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/lineString" }
                }
            }
        },
        {
            "title": "Polygon",
            "properties": {
                "type": { "enum": [ "Polygon" ] },
                "coordinates": { "$ref": "#/definitions/polygon" }
            }
        },
        {
            "title": "MultiPolygon",
            "properties": {
                "type": { "enum": [ "MultiPolygon" ] },
                "coordinates": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/polygon" }
                }
            }
        }
    ],
    "definitions": {
        "position": {
            "description": "A single position",
            "type": "array",
            "minItems": 2,
            "items": [
                { "type": "number" },
                { "type": "number" }
            ],
            "additionalItems": false
        },
        "positionArray": {
            "description": "An array of positions",
            "type": "array",
            "items": { "$ref": "#/definitions/position" }
        },
        "lineString": {
            "description": "An array of two or more positions",
            "allOf": [
                { "$ref": "#/definitions/positionArray" },
                { "minItems": 2 }
            ]
        },
        "linearRing": {
            "description": "An array of four positions where the first equals the last",
            "allOf": [
                { "$ref": "#/definitions/positionArray" },
                { "minItems": 4 },
                { "maxItems": 4 }
            ]
        },
        "polygon": {
            "description": "An array of linear rings",
            "type": "array",
            "items": { "$ref": "#/definitions/linearRing" }
        }
    }
}

This was super helpful!

This version has bugs, e.g.

{ "minItems": 4 },
{ "maxItems": 4 } 

in linearRing.

As I see, updated version of this schema is available here: https://github.com/fge/sample-json-schemas/blob/master/geojson/geometry.json