メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.891265175304 43.0171555611493, 142.891223348331 43.0171289297542, 142.890680534323 43.0167837611106, 142.890154149928 43.01646022957, 142.891112305555 43.0156186610868, 142.891255595307 43.0157111875252, 142.892176846508 43.0162639583242, 142.892240549755 43.0163021418227, 142.892013306759 43.016504626962, 142.891475623199 43.0169735677724, 142.891265175304 43.0171555611493)) ^^http://www.opengis.net/ont/geosparql#wktLiteral