メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.333431706962 43.0508582276503, 141.33340602638 43.0510435516122, 141.333383377201 43.0512120909619, 141.333320547685 43.0516637359232, 141.332784920223 43.0516334206443, 141.332648429708 43.0516222689025, 141.331627214392 43.0515567560533, 141.331684774223 43.051099232066, 141.331710286832 43.0508933714762, 141.331734375963 43.0507250556571, 141.331745707107 43.0506276691572, 141.331774314224 43.0504008051627, 141.333475706681 43.0505117852075, 141.333469543326 43.0505392348187, 141.333431706962 43.0508582276503)) ^^http://www.opengis.net/ont/geosparql#wktLiteral