メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.329176342268 43.7569894049909, 142.329646441617 43.7571162550609, 142.329002529696 43.758233926982, 142.328557236187 43.7580887564584, 142.327919546472 43.7578911855636, 142.32856831142 43.7567990952132, 142.328864300851 43.7568917330318, 142.329176342268 43.7569894049909)) ^^http://www.opengis.net/ont/geosparql#wktLiteral