メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.97287136504 43.5377145055856, 144.972471770809 43.5374484518011, 144.972929518058 43.5371687470505, 144.973422389163 43.5368534661852, 144.973503428429 43.5368028377978, 144.973879196948 43.537054970313, 144.973812664819 43.5371057453557, 144.97287136504 43.5377145055856)) ^^http://www.opengis.net/ont/geosparql#wktLiteral