# A GeoJSON object without a member named "crs" contains geometries in a Geographic projection, in the WGS84 datum, with units in decimal degrees. A GeoJSON object may have a member with the name "crs".  If a GeoJSON object has a member named "crs", it is assumed to represent the coordinate reference system of the included geometry or geometries.

# A GeoJSON object without a member named "crs" contains geometries in a Geographic projection, in the WGS84 datum, with units in decimal degrees. A GeoJSON object may have a member with the name "crs".  If a GeoJSON object has a member named "crs", it is assumed to represent the coordinate reference system of the included geometry or geometries.

## The value of a member named "crs" must be an object.  This object must have at least two named members: "type" and "properties".  The value of the member named "type" must be a string.  The value of the member named "properties" must be an object.  This specification defines no further requirements for the structure of these objects.  Instead, a convention is offered.

## The value of a member named "crs" must be an object.  This object must have at least two named members: "type" and "properties".  The value of the member named "type" must be a string.  The value of the member named "properties" must be an object.  This specification defines no further requirements for the structure of these objects.  Instead, a convention is offered.