Provide a flexible Locations Hierarchy.

Sahana 2 has a nice hierarchical Locations system: http://wiki.sahana.lk/doku.php?id=dev:location_handler [[BR]]
This is useful for categorising data for Reporting purposes.[[BR]]
It doesn't have any link to GIS though....we need to be able to link the Locations to GIS polygons.

The definition of Locations can be different in different sectors, e.g.:
 * category = "Health" would have types = National, Regional, Provincial, District, MOH Divisions, PHI areas, etc
 * category = "Governance" would have types = National, Provincial (or state), District, Division, Tribunal (or Gramasevaka area)

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[wiki:BluePrintGeographicInformationSystems GIS BluePrints]