メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.255898761668 44.0225959905676, 144.255184381361 44.0229920952875, 144.254209214618 44.021746738423, 144.254472696155 44.0216827503656, 144.254686807896 44.0216515889675, 144.255236440298 44.0216236638422, 144.256125094669 44.0217084893457, 144.255898761668 44.0225959905676)) ^^http://www.opengis.net/ont/geosparql#wktLiteral