メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.869769878408 35.1563418349596, 136.869785076509 35.1566496303847, 136.86979941713 35.1569399582354, 136.868560660906 35.15696656855, 136.868562666773 35.156668815347, 136.868552857396 35.1563835694478, 136.868523167331 35.1557412890363, 136.869775737874 35.1563223411631, 136.869769878408 35.1563418349596)) ^^http://www.opengis.net/ont/geosparql#wktLiteral