メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.264237436074 44.0275554960729, 144.264167199737 44.0276397115093, 144.26408118283 44.0277242136726, 144.263950878659 44.0278132708249, 144.263629764592 44.0279773626248, 144.262432540525 44.0275608497282, 144.262781472622 44.0270555109395, 144.264237436074 44.0275554960729)) ^^http://www.opengis.net/ont/geosparql#wktLiteral