メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.361299344745 43.7726222979526, 142.361609620007 43.7731891546719, 142.36052799466 43.7735017657799, 142.360028567169 43.7736557514785, 142.359903378844 43.7734184154254, 142.35972811424 43.7730861054184, 142.359415923113 43.7725039874394, 142.360978964199 43.7720514072457, 142.361299344745 43.7726222979526)) ^^http://www.opengis.net/ont/geosparql#wktLiteral