メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3170060997 37.3622049094489, 140.315867473194 37.3622796615576, 140.315859144631 37.3619217873009, 140.316017916961 37.3618835473727, 140.316590086749 37.3618136357077, 140.317027503739 37.3617598994034, 140.3170060997 37.3622049094489)) ^^http://www.opengis.net/ont/geosparql#wktLiteral