メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324127302671 43.0690762489947, 141.323977985023 43.0696406269587, 141.323831768 43.0702219801408, 141.323120964436 43.070124226555, 141.3226058125 43.070048592935, 141.322318840029 43.0700072315038, 141.3222421662 43.0699962710436, 141.322393312566 43.0694261422766, 141.322535114396 43.0688460934138, 141.32326401467 43.0689512399023, 141.32340434085 43.0689714369306, 141.324127302671 43.0690762489947)) ^^http://www.opengis.net/ont/geosparql#wktLiteral