メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.384163413796 42.9825988183311, 144.382564331558 42.9823203499681, 144.382639701138 42.9820901701704, 144.381750223471 42.982089321552, 144.381955983709 42.9814305271971, 144.384000107398 42.9815280446744, 144.384489231143 42.9815517556806, 144.384338390072 42.9820254110312, 144.384163413796 42.9825988183311)) ^^http://www.opengis.net/ont/geosparql#wktLiteral