メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398210095306 44.1665308909119, 142.397702571078 44.166447252673, 142.398086108414 44.1652359833056, 142.398572157858 44.1653011367176, 142.398456373636 44.165732384877, 142.398210095306 44.1665308909119)) ^^http://www.opengis.net/ont/geosparql#wktLiteral