メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.322766074818 43.0489763438269, 141.323415328717 43.0490689529617, 141.323276613503 43.0496259632721, 141.323156141169 43.0501558337689, 141.323072250504 43.0504918203421, 141.323025493193 43.050699053708, 141.322980792579 43.050897020684, 141.322092143561 43.0506845947245, 141.32204952231 43.0508081690408, 141.321634536424 43.0507151324802, 141.321809878891 43.0499690948412, 141.321954441186 43.0493906522416, 141.322080743298 43.048885266774, 141.322766074818 43.0489763438269)) ^^http://www.opengis.net/ont/geosparql#wktLiteral