メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.048879937731 42.907063343219, 143.049568846893 42.9070970810021, 143.049407788592 42.9083589246649, 143.048647819046 42.9083026834525, 143.048625063325 42.9083000989658, 143.047902583618 42.908246263434, 143.048087181647 42.9070154846758, 143.048879937731 42.907063343219)) ^^http://www.opengis.net/ont/geosparql#wktLiteral