メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.187336471371 34.8048584533136, 137.18590749576 34.8049958927919, 137.185748496356 34.8047443523118, 137.185639188691 34.8046204182745, 137.185561821144 34.8045171847809, 137.18542054959 34.8043162081515, 137.186758212158 34.8042614713137, 137.187453685428 34.8042345860778, 137.187336471371 34.8048584533136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral