メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.371732963119 43.7447653635488, 142.370512031653 43.7452485697837, 142.370655659698 43.7451408610468, 142.371024770915 43.7444840352257, 142.371039163228 43.7444598995083, 142.371407778575 43.7438059583525, 142.372706192103 43.7442092474632, 142.372172372715 43.7445735882516, 142.371732963119 43.7447653635488)) ^^http://www.opengis.net/ont/geosparql#wktLiteral