メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.316393677847 43.0530646013919, 141.316089716731 43.0529919333056, 141.315771566093 43.0529190072394, 141.315385963613 43.0528482723491, 141.315124744916 43.0528407228767, 141.315101810797 43.0526460050383, 141.315072665279 43.0525444930353, 141.314935784865 43.0522373021675, 141.31494338907 43.0521281432022, 141.315072957818 43.0520330617602, 141.316495555424 43.0526203900205, 141.316393677847 43.0530646013919)) ^^http://www.opengis.net/ont/geosparql#wktLiteral