メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.060795041374 42.9133285057199, 143.060705662596 42.9139190159645, 143.059570942484 42.9138031166237, 143.05874805747 42.9137233355803, 143.058812270621 42.9132193018898, 143.058895049172 42.9126569715268, 143.05959277557 42.9127229370594, 143.059757174517 42.9127385142739, 143.060857559833 42.9128424179399, 143.06086762 42.9128435422589, 143.060795041374 42.9133285057199)) ^^http://www.opengis.net/ont/geosparql#wktLiteral