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Feature

A discrete spatial phenomenon in a universe of discourse.

NOTE: A Feature represents a uniquely identifiable phenomenon, for example a river or an apple. While such phenomena (and therefore the Features used to represent them) are bounded, their boundaries may be crisp (e.g., the declared boundaries of a state), vague (e.g., the delineation of a valley versus its neighboring mountains), and change with time (e.g., a storm front). While discrete in nature, Features may be created from continuous observations, such as an isochrone that determines the region that can be reached by ambulance within 5 minutes.

Diagram

cluster_associated SpatialObject SpatialObject Feature Feature Feature->SpatialObject Geometry Geometry Feature->Geometry defaultGeometry Feature->Geometry hasBoundingBox Feature->Geometry hasCentroid Feature->Geometry hasDefaultGeometry Feature->Geometry hasGeometry

Feature Diagram

Formalization for Feature

Property Constraint
defaultGeometry only Geometry
hasBoundingBox only Geometry
hasCentroid only Geometry
hasDefaultGeometry only Geometry
hasGeometry only Geometry
disjointWith Geometry
subClassOf SpatialObject

Used by classes

Class Property
Feature Collection (rdfs) rdfs:member