メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.055616030017 42.9135194921851, 143.055616947843 42.9135017624291, 143.056291347567 42.9135543396161, 143.056121425197 42.9149645032473, 143.05542861105 42.9149245028316, 143.055430955153 42.9149135851815, 143.054636052404 42.9148593866274, 143.054855708028 42.9134743367622, 143.055616030017 42.9135194921851)) ^^http://www.opengis.net/ont/geosparql#wktLiteral