メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.989282706167 34.9058723487104, 136.988291296386 34.9061750816128, 136.988170786893 34.9058209314608, 136.987913853639 34.9050414033035, 136.987622649857 34.9041766756738, 136.988446953875 34.9039699105684, 136.988741026958 34.9046541310238, 136.989282706167 34.9058723487104)) ^^http://www.opengis.net/ont/geosparql#wktLiteral