メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.063827523111 42.9235544803927, 143.063703068052 42.9244454183829, 143.061706099121 42.9242516205448, 143.061834547483 42.9232323701632, 143.061942969433 42.9223719309427, 143.062029747068 42.9217727181513, 143.063199397403 42.9218554279053, 143.064090500737 42.9219183733136, 143.064025968575 42.922381195998, 143.063827523111 42.9235544803927)) ^^http://www.opengis.net/ont/geosparql#wktLiteral