メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.346166149102 44.4810570885243, 142.346094478601 44.4810390784679, 142.345021902707 44.4807694426783, 142.344028616234 44.480586533448, 142.344062241125 44.4805128875158, 142.344193846139 44.4802246384814, 142.344293712178 44.4800059189475, 142.346356639993 44.4804917889958, 142.34642736751 44.4805084294938, 142.346166149102 44.4810570885243)) ^^http://www.opengis.net/ont/geosparql#wktLiteral