メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.349162766759 43.7610061496294, 142.34991407014 43.7615148218885, 142.350170287143 43.7616812202438, 142.349032209531 43.7625484397184, 142.34877536704 43.7623841663511, 142.348118416363 43.7619484503622, 142.34802952564 43.7619020459895, 142.347286424215 43.7613802395405, 142.348148695716 43.760705728145, 142.348525396962 43.7605577252788, 142.349162766759 43.7610061496294)) ^^http://www.opengis.net/ont/geosparql#wktLiteral