メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37793944498 43.0506720913261, 141.377328619985 43.0510683889115, 141.376807413625 43.0514065703641, 141.376429305244 43.0510602633192, 141.376066301425 43.0507648493396, 141.37657337252 43.0504495614283, 141.377599011355 43.049818644123, 141.37812025149 43.0502763142581, 141.378319300653 43.0504413478824, 141.37793944498 43.0506720913261)) ^^http://www.opengis.net/ont/geosparql#wktLiteral