メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.252795436556 34.817277771134, 137.252153253283 34.8173571271122, 137.251934363604 34.8170980929655, 137.251811162621 34.8168727969552, 137.251728860353 34.8165460476024, 137.251660277374 34.8162756347858, 137.252438950817 34.8160384079638, 137.252438929117 34.8160158693418, 137.252479912951 34.816004569783, 137.252713108636 34.8169284824993, 137.252795436556 34.817277771134)) ^^http://www.opengis.net/ont/geosparql#wktLiteral