メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.334067541089 42.988167322494, 141.333851758025 42.9885706987696, 141.333241472637 42.9895803263891, 141.332753894983 42.9902413920063, 141.33268456403 42.9903490741602, 141.332271727037 42.9901635376924, 141.332013473558 42.9900583620515, 141.33182244014 42.9900393171037, 141.331885917244 42.9896938718409, 141.331927689133 42.9893906620549, 141.331966271485 42.9889926911963, 141.332086543625 42.9880290756697, 141.333183990403 42.9881022256846, 141.334067541089 42.988167322494)) ^^http://www.opengis.net/ont/geosparql#wktLiteral