メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.939057724009 42.9403008297437, 142.93920005006 42.9404275547973, 142.939298068858 42.9405125581537, 142.93902653515 42.9407223007033, 142.938889582367 42.9408281277168, 142.938864002943 42.9408479039499, 142.938284169101 42.9412973573262, 142.937865308742 42.9416364763596, 142.937792364936 42.9416837544096, 142.937516602524 42.9414292633864, 142.936548989212 42.9405574720783, 142.936138047903 42.9401931570151, 142.936197754645 42.9401561562616, 142.937247219559 42.9395301108898, 142.937447560872 42.9397092379419, 142.938100620436 42.9403157929981, 142.938176013822 42.9402521130099, 142.938660046349 42.9399467823887, 142.939057724009 42.9403008297437)) ^^http://www.opengis.net/ont/geosparql#wktLiteral