メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.748054211859 35.4221843803022, 136.748004220147 35.4224194848367, 136.747646716593 35.4229871856524, 136.746786188037 35.4226096446834, 136.747081050906 35.4221112785184, 136.747098624938 35.4219899338082, 136.748054211859 35.4221843803022)) ^^http://www.opengis.net/ont/geosparql#wktLiteral