GeoJSON
From Open Risk Manual
Definition
GeoJSON is a format for encoding a variety of geographic data structures. GeoJSON is a geospatial data interchange format based on JavaScript Object Notation (JSON).
GeoJSON defines several types of JSON objects and the manner in which they are combined to represent data about geographic features, their properties, and their spatial extents. GeoJSON uses a specific geographic coordinate reference system, the World Geodetic System 1984, and units of decimal degrees.
