メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.405308392176 44.176962400269, 142.405216019251 44.1769415722857, 142.405121206172 44.1768945344979, 142.404466491826 44.176466507537, 142.404974353197 44.1759971806597, 142.405147794626 44.1761068330493, 142.40547455873 44.1763134375823, 142.405308392176 44.176962400269)) ^^http://www.opengis.net/ont/geosparql#wktLiteral