### A feature object must have a member with the name "geometry". The value of the geometry member is a geometry object as defined above or a JSON null value (as in <code>{"type":"Feature", "properties": {"title":"empty"}, "geometry":null}</code>).

### A feature object must have a member with the name "properties". The value of the properties member is an object (any JSON object).

### If a feature has a commonly used identifier, that identifier should be included as a member of the feature object with the name "id".

## A GeoJSON object with the type "FeatureCollection" represents a collection of feature objects.

### An object of type "FeatureCollection" must have a member with the name "features". The value corresponding to "features" is an array. Each element in the array is a feature object as defined above.

## '''Default coordinate reference system''': The default is a geographic coordinate reference system, using the WGS84 datum, and with longitude and latitude units of decimal degrees.

## '''The "crs" member''': The value of a member named "crs" must be an object (referred to as the CRS object below) or null. If the value of CRS is null, it means that no CRS can be assumed.

Exception encountered, of type "Error"