メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375735513846 43.8241600811489, 142.375258164009 43.8238084840085, 142.374045340337 43.8229294892593, 142.373802413994 43.8227291219455, 142.376288286915 43.821022100123, 142.376517141294 43.8211591708747, 142.377593539833 43.8219221009685, 142.378280309483 43.822407261811, 142.378289757159 43.8224139490669, 142.376730517612 43.8234334934598, 142.375735513846 43.8241600811489)) ^^http://www.opengis.net/ont/geosparql#wktLiteral