メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.920899664452 37.8055275562374, 140.920722237919 37.8054918843842, 140.92060987031 37.8054641993684, 140.920402183126 37.8053371571206, 140.920407989759 37.8051946308006, 140.920681852234 37.8051094686835, 140.920976916093 37.8051149141049, 140.920958351746 37.8052101127432, 140.920899664452 37.8055275562374)) ^^http://www.opengis.net/ont/geosparql#wktLiteral