OSID - osid.mapping.SpatialUnit Service Interface Definition

Interface	osid.mapping.SpatialUnit
Implements	`osid.OsidPrimitive`
Implements	`osid.Extensible`
Description	A spatial unit can represent a single position or an area constructed of multiple positions or shapes. The data describing the spatial unit is defined in the record indicated by the record type.
Method	getCenterCoordinate
Description	Gets a single corrdinate to represent the center of this spatial unit.
Return	`osid.mapping.Coordinate`		the center coordinate
Compliance	`mandatory`		This method must be implemented.
Method	getBoundingCoordinates
Description	Gets a list of bounding coordinates of this spatial unit.
Return	`osid.mapping.CoordinateList`		the bounding coordinates
Compliance	`mandatory`		This method must be implemented.
Method	getSpatialUnitRecord
Description	Gets the spatial unit record corresponding to the given `SpatialUnit` record `Type.` The `spatialUnitRecordType` may be the `Type` returned in `getRecordTypes()` or any of its parents in a `Type` hierarchy where `hasRecordType(spatialUnitRecordType)` is `true` .
Parameters	`osid.type.Type`	`spatialUnitRecordType`	the type of spatial unit record to retrieve
Return	`osid.mapping.records.SpatialUnitRecord`		the spatial unit record
Errors	NULL_ARGUMENT		`spatialUnitRecordType` is `null`
Errors	UNSUPPORTED		`hasRecordType(spatialUnitRecordType)` is `false`
Compliance	`mandatory`		This method must be implemented.