メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.834112877387 43.0827579523513, 142.834022832679 43.0827382280303, 142.833360504198 43.0825932148275, 142.83300806461 43.0824497108038, 142.832873550714 43.0822733751316, 142.832730945474 43.0821189542668, 142.832620122198 43.0820429998171, 142.832906509783 43.081347449825, 142.83378212766 43.0815239411645, 142.834472693787 43.0816631085296, 142.834554118159 43.0816795008165, 142.834112877387 43.0827579523513)) ^^http://www.opengis.net/ont/geosparql#wktLiteral