メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.069835695803 20.4251203294157, 136.069905972287 20.4250091145941, 136.070023838378 20.4250308296262, 136.070094986381 20.4251417221291, 136.070024980853 20.4252540702519, 136.069930624339 20.4252982503102, 136.069859651716 20.4252538753628, 136.069835695803 20.4251203294157)) ^^http://www.opengis.net/ont/geosparql#wktLiteral