メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.328557236187 43.7580887564584, 142.329002529696 43.758233926982, 142.328360935342 43.7592879365794, 142.327926140554 43.7591627273651, 142.327452685296 43.7589872813275, 142.327311348448 43.7589394873494, 142.327919546472 43.7578911855636, 142.328557236187 43.7580887564584)) ^^http://www.opengis.net/ont/geosparql#wktLiteral