メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377301364413 43.8288647945126, 142.377021118717 43.8286288226556, 142.376740953277 43.8284302786509, 142.375309025364 43.8274155360888, 142.375588646334 43.8272148701575, 142.376238299592 43.8273779043771, 142.376902593698 43.8275620337951, 142.377868626366 43.827837384556, 142.378416157479 43.828007552198, 142.377301364413 43.8288647945126)) ^^http://www.opengis.net/ont/geosparql#wktLiteral