メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.989008067891 34.9001794219794, 136.988683956811 34.9002955769936, 136.98773022136 34.9005782840179, 136.986864026129 34.9008113911673, 136.986861629427 34.9007830052013, 136.986634586576 34.8998715329676, 136.987442976674 34.8996029169209, 136.988577925014 34.8992180050919, 136.989008067891 34.9001794219794)) ^^http://www.opengis.net/ont/geosparql#wktLiteral