メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.703120109874 44.3658374795773, 141.702603581295 44.3661712442122, 141.702366739086 44.3663319346719, 141.70205583839 44.3665351601209, 141.701833142956 44.3663559470401, 141.700967652583 44.3656664530582, 141.701257193692 44.3654779979016, 141.70151221761 44.3653066743015, 141.702034295396 44.3649559252129, 141.702122198071 44.3650262751041, 141.70287207432 44.3656374730703, 141.703120109874 44.3658374795773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral