メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.36618878632 43.7317862605495, 142.365379063493 43.731568629558, 142.365895774038 43.730664382676, 142.366665945733 43.730886919694, 142.366588649927 43.7310332651454, 142.366364083218 43.7314859889117, 142.366248561882 43.7316861857585, 142.36618878632 43.7317862605495)) ^^http://www.opengis.net/ont/geosparql#wktLiteral