メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.720922371631 34.4881178187611, 135.719759287229 34.4881137444267, 135.719760220487 34.487525910559, 135.720918738411 34.4875388492379, 135.720922371631 34.4881178187611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral