メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.912031122135 35.0815062959379, 136.911257370025 35.0815836260976, 136.909548830901 35.0817903289447, 136.909527913374 35.0816910545204, 136.909432365563 35.0808608803449, 136.909380564246 35.0804429321518, 136.909628037852 35.0804161268404, 136.909638075091 35.0804603752568, 136.909801422044 35.0804398729853, 136.911819677698 35.0802150073495, 136.912031122135 35.0815062959379)) ^^http://www.opengis.net/ont/geosparql#wktLiteral