メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.790711897401 35.441612975019, 136.790312445293 35.4424275922093, 136.78835906376 35.4417636693223, 136.789407953223 35.4411870501192, 136.790711897401 35.441612975019)) ^^http://www.opengis.net/ont/geosparql#wktLiteral