メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.086253048151 43.5391894920761, 142.085845297519 43.539150952108, 142.086128741421 43.5372366434692, 142.086959577962 43.5371720008159, 142.08664154958 43.5382214463616, 142.086253048151 43.5391894920761)) ^^http://www.opengis.net/ont/geosparql#wktLiteral