メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.989712147326 34.8816066954472, 136.988277002588 34.8819241219996, 136.987841999618 34.8806178561938, 136.988765146166 34.8800312757597, 136.988795611959 34.8800119519995, 136.9896746227 34.879480727325, 136.990170360507 34.8810232252693, 136.990317257765 34.8814666519531, 136.989712147326 34.8816066954472)) ^^http://www.opengis.net/ont/geosparql#wktLiteral