メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.251660277374 34.8162756347858, 137.2512914205 34.8163773270182, 137.250921880364 34.8157577860391, 137.25182337312 34.8153514335151, 137.252560957074 34.8150240786604, 137.2530946583 34.8158238049878, 137.252479912951 34.816004569783, 137.252438929117 34.8160158693418, 137.252438950817 34.8160384079638, 137.251660277374 34.8162756347858)) ^^http://www.opengis.net/ont/geosparql#wktLiteral