メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.705180656999 44.362928999475, 141.705097326205 44.3629839025602, 141.704160483156 44.3635939022892, 141.703273602275 44.3628873776438, 141.703079163564 44.3627324543005, 141.703507963807 44.3624591939377, 141.703590548779 44.3624055179012, 141.704109419964 44.3620684876869, 141.704279731468 44.362198825462, 141.704556730704 44.3624083546876, 141.704883942944 44.3626570427985, 141.705213446012 44.3629073934772, 141.705180656999 44.362928999475)) ^^http://www.opengis.net/ont/geosparql#wktLiteral