メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.524834639207 40.4905420456116, 141.524669475325 40.4905983028122, 141.524644639199 40.4903112421839, 141.524582974259 40.4897674820335, 141.525360328942 40.4897345706392, 141.525277346131 40.489931866069, 141.52517587947 40.4901195962115, 141.525025134753 40.4903367872129, 141.524834639207 40.4905420456116)) ^^http://www.opengis.net/ont/geosparql#wktLiteral