メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.111688797398 43.8313931559733, 144.111602585839 43.8314196480772, 144.108435579988 43.8323919868734, 144.108406077496 43.8323428398987, 144.108287405726 43.8321374166369, 144.107667547432 43.8310637253605, 144.109805794227 43.8304278241701, 144.109933034418 43.8306401371159, 144.110938920725 43.830313232482, 144.112054019515 43.8299502397199, 144.111961254818 43.8304778654008, 144.111901622007 43.8308403675907, 144.111703252797 43.8313457538165, 144.111688797398 43.8313931559733)) ^^http://www.opengis.net/ont/geosparql#wktLiteral