メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908962895027 43.4944399418486, 141.90804765888 43.4945720994225, 141.907818327586 43.4937515485358, 141.908741871209 43.4936119611014, 141.908962895027 43.4944399418486)) ^^http://www.opengis.net/ont/geosparql#wktLiteral