メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.31209279277 43.0687402854033, 141.312824499371 43.0693643330243, 141.312091535679 43.0697537164799, 141.311613686762 43.0700075542637, 141.311596181828 43.0700168350118, 141.310921542045 43.070354926769, 141.310816502434 43.0702165725712, 141.310697829767 43.0700978669062, 141.310479859583 43.0699046409735, 141.310124797458 43.0696056399143, 141.309673515279 43.0692256013529, 141.310045227581 43.0690060650487, 141.310146673998 43.068946134257, 141.310288196361 43.0688624798278, 141.311418392501 43.0681650218493, 141.311473030935 43.0682115355463, 141.312004917848 43.0686652977903, 141.31209279277 43.0687402854033)) ^^http://www.opengis.net/ont/geosparql#wktLiteral