メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.105178090934 43.8225639551907, 144.103805301 43.8229829314457, 144.103165805772 43.8218837575376, 144.103878886803 43.821670678001, 144.104511894918 43.8214814142757, 144.104603875 43.8216414981201, 144.104932690778 43.8222044959417, 144.105178090934 43.8225639551907)) ^^http://www.opengis.net/ont/geosparql#wktLiteral