メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.823237935231 35.520951165794, 137.82256036467 35.5205400556068, 137.822635178565 35.5204726639286, 137.822547727076 35.5204296035956, 137.822505074681 35.5203648256395, 137.822266760841 35.5201421592242, 137.821884548441 35.5199007959345, 137.822056005238 35.5197257133131, 137.822543540254 35.5200359057547, 137.823499383424 35.5206343439841, 137.823237935231 35.520951165794)) ^^http://www.opengis.net/ont/geosparql#wktLiteral