メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.04900439296 42.9170270444921, 143.049752428854 42.9170809760108, 143.049579263513 42.9183267114176, 143.04882300108 42.9182741014915, 143.048082501207 42.9182267927484, 143.048217918759 42.9172198195129, 143.048259309859 42.9169793469935, 143.04900439296 42.9170270444921)) ^^http://www.opengis.net/ont/geosparql#wktLiteral