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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.

See: http://geojson.org/