メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.315719813614 43.0903323250812, 141.31587450053 43.0904586335792, 141.316025230057 43.0906180335516, 141.315642378929 43.0908495931726, 141.315238357439 43.091091176047, 141.314268645786 43.0916852600047, 141.313951141935 43.0913931897164, 141.313734966766 43.0911898577245, 141.313970430546 43.0910402972527, 141.314167230431 43.0909153160746, 141.314467989449 43.0907124168443, 141.314666509742 43.0905877306517, 141.315016337495 43.0903571700086, 141.3154177198 43.0900869424727, 141.315719813614 43.0903323250812)) ^^http://www.opengis.net/ont/geosparql#wktLiteral