メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.036760329427 42.9121861227927, 143.035999936562 42.9121335919714, 143.035970842742 42.9124228566565, 143.034897126269 42.9123436287356, 143.034897737547 42.9123389126367, 143.035094671416 42.9109051098564, 143.036143873359 42.9109773299406, 143.036907894611 42.9110415796768, 143.036760329427 42.9121861227927)) ^^http://www.opengis.net/ont/geosparql#wktLiteral