メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.759436448719 43.2025216387268, 141.759204649424 43.2027516037247, 141.758941356642 43.2030184953815, 141.75805974551 43.2025619387535, 141.758296159161 43.2023085760296, 141.758533108541 43.2020481135342, 141.758567489718 43.2020103536051, 141.759487453081 43.2024790976814, 141.759436448719 43.2025216387268)) ^^http://www.opengis.net/ont/geosparql#wktLiteral