Geographic Region

This specifies a geographic area. Specifically, this is any entity capable of providing, among other things, the following information:

• whether or not a given Location is inside the region
• a list of Locations that constitutes a polygonal outline the region

In addition to an arbitrary polygon, the following simpler types of Geographic Regions are also supported:

• Circular (specified by a Location and a radius in km)
• Rectangular (specified by a max & min decimal latitude and longitude)