メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.339299016072 43.7738016560521, 142.339316578149 43.773808444253, 142.33832252129 43.7748238656801, 142.33776536867 43.774552615584, 142.337196834368 43.7742566534477, 142.336651192242 43.7739644160903, 142.337413188469 43.7731959656605, 142.337457040283 43.7731194918348, 142.337922276822 43.7726381639278, 142.339708175591 43.7732915682625, 142.339299016072 43.7738016560521)) ^^http://www.opengis.net/ont/geosparql#wktLiteral