メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.982713263427 43.5479585634705, 144.982556035216 43.5478467205965, 144.982449949312 43.5477712044877, 144.982171355913 43.5475623771815, 144.983489067953 43.5465241715534, 144.984051830507 43.5468941127828, 144.982713263427 43.5479585634705)) ^^http://www.opengis.net/ont/geosparql#wktLiteral