メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.379793225309 44.1719967516364, 142.37771768113 44.1716891360448, 142.377724257514 44.1716239449821, 142.37773552455 44.1713239964395, 142.37774700442 44.1711268861013, 142.377758113874 44.1709954351632, 142.380006339994 44.171299864992, 142.379793225309 44.1719967516364)) ^^http://www.opengis.net/ont/geosparql#wktLiteral