メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.613365483571 33.2438767291724, 131.61543491494 33.2440740871187, 131.615349451365 33.2446359510502, 131.615275834768 33.245207672205, 131.613196988989 33.2450103560384, 131.611772591817 33.2448691022995, 131.611841617136 33.2443092793367, 131.611917588591 33.2437355951306, 131.613365483571 33.2438767291724)) ^^http://www.opengis.net/ont/geosparql#wktLiteral