メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.485617160631 40.5433968545916, 141.485375068465 40.5434782588247, 141.4844713531 40.5436707251345, 141.484453925561 40.5432820887386, 141.485113455581 40.5431861356863, 141.485468323001 40.543126465719, 141.486464163273 40.5429214922486, 141.486613533253 40.5428907469586, 141.486418192533 40.5430029234331, 141.485726321803 40.543360109153, 141.485617160631 40.5433968545916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral