メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.593121479382 40.6459564744627, 140.593176228086 40.6466591805391, 140.592029781888 40.6467412224809, 140.591881624893 40.646079901932, 140.592221268519 40.6460317815123, 140.592585810167 40.6459753401864, 140.593121479382 40.6459564744627)) ^^http://www.opengis.net/ont/geosparql#wktLiteral