メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.480860274174 43.448305309626, 142.477979687968 43.4496483466118, 142.476680617221 43.4482006599914, 142.478132127776 43.4475164509943, 142.479590445263 43.4468534835026, 142.479664242456 43.4468926837901, 142.480860274174 43.448305309626)) ^^http://www.opengis.net/ont/geosparql#wktLiteral