メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.109420829854 43.824983801619, 144.108068039341 43.8254095169357, 144.107531560021 43.8245224449425, 144.108254813655 43.8243111241579, 144.108749696592 43.8241460433647, 144.109208776683 43.8247672440531, 144.109420829854 43.824983801619)) ^^http://www.opengis.net/ont/geosparql#wktLiteral