メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.423307740737 43.7444893412857, 142.423386043653 43.7451168562102, 142.423445090604 43.7455900089012, 142.422906489294 43.7456191541649, 142.421885102269 43.745674434433, 142.421646472029 43.7458298825397, 142.421190163898 43.7461347482509, 142.421188082013 43.7461361401985, 142.421087731323 43.7460390175116, 142.421075876586 43.7460275370569, 142.420614009251 43.7455805383615, 142.421249312195 43.7452299273175, 142.423261577921 43.7441193645002, 142.423307740737 43.7444893412857)) ^^http://www.opengis.net/ont/geosparql#wktLiteral