メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.057338324047 42.9063955386759, 143.057089340035 42.906377810124, 143.055105581125 42.9062259202835, 143.055314299631 42.9047025186897, 143.055501634343 42.9047180819687, 143.055941525714 42.904284763012, 143.056567089183 42.9048181979338, 143.0570853936 42.9052985796168, 143.057374363637 42.9055214688535, 143.057485227468 42.9055931298951, 143.057338324047 42.9063955386759)) ^^http://www.opengis.net/ont/geosparql#wktLiteral