メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.98296766986 43.5535134079769, 144.982161807957 43.5532124201532, 144.981969596147 43.5531696570635, 144.982666763966 43.5525855125392, 144.98296766986 43.5535134079769)) ^^http://www.opengis.net/ont/geosparql#wktLiteral