メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.418230949453 43.8006754589608, 142.419284155578 43.801346464291, 142.418102435778 43.8023244821267, 142.417065945757 43.8016703892148, 142.415994462813 43.8010144720883, 142.417181871967 43.8000360287974, 142.417779211206 43.8004049422228, 142.418230949453 43.8006754589608)) ^^http://www.opengis.net/ont/geosparql#wktLiteral