メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.382195410028 43.7627355077073, 142.382477348629 43.7632774529069, 142.38101332398 43.7637160693308, 142.380699415291 43.7631805560271, 142.380359944445 43.7625934193612, 142.381859920028 43.7621443443275, 142.381865901087 43.7621555538717, 142.382195410028 43.7627355077073)) ^^http://www.opengis.net/ont/geosparql#wktLiteral