メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.058679108668 42.91423844427, 143.05863071774 42.9147087477587, 143.058571857562 42.9151613296859, 143.056913099655 42.9150277159275, 143.056121425197 42.9149645032473, 143.056291347567 42.9135543396161, 143.057096529684 42.913612813823, 143.05874805747 42.9137233355803, 143.058679108668 42.91423844427)) ^^http://www.opengis.net/ont/geosparql#wktLiteral