メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.378615775212 42.9841251990628, 144.377714743417 42.983962572315, 144.376119098321 42.9836728388677, 144.376308716208 42.9830829219507, 144.377913783324 42.9833740946448, 144.378808421591 42.9835348714124, 144.378615775212 42.9841251990628)) ^^http://www.opengis.net/ont/geosparql#wktLiteral