メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.341147390759 43.7823127907743, 142.341326178259 43.7826759814459, 142.339798071295 43.7830563918612, 142.340145048391 43.7839658844328, 142.340059637619 43.7839601518432, 142.339915681337 43.784070479958, 142.338530189717 43.7830209919401, 142.338891570745 43.7827564358503, 142.340188502237 43.7817895632127, 142.340839964315 43.7819707840229, 142.340993499617 43.7820238403988, 142.341022944165 43.7820837663005, 142.341147390759 43.7823127907743)) ^^http://www.opengis.net/ont/geosparql#wktLiteral