GeoJSON is now at version 1.0! See the finalized specification. Thanks to everyone who helped build GeoJSON.
GeoJSON is a format for encoding a variety of geographic data structures. A GeoJSON object may represent a geometry, a feature, or a collection of features. GeoJSON supports the following geometry types: Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. Features in GeoJSON contain a geometry object and additional properties, and a feature collection represents a list of features.
GeoJSON has been adopted by more than 20 different projects, and represents more than a year of community development efforts.