メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.548055098614 43.2418606497484, 143.547669177681 43.2418801586786, 143.547578772556 43.2408214676528, 143.548278322396 43.2407898823502, 143.548363277767 43.241845118763, 143.548363531083 43.2418479992634, 143.548055098614 43.2418606497484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral