メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.290264287176 43.0772157433002, 141.290796519679 43.0776919004406, 141.290985077179 43.0778619188324, 141.290513061352 43.0781439221021, 141.289789237942 43.0774954673688, 141.288975642157 43.0767543350536, 141.289199114767 43.0766234293922, 141.289447442806 43.076485910055, 141.289537789908 43.076549050058, 141.290158157976 43.0771187136708, 141.290264287176 43.0772157433002)) ^^http://www.opengis.net/ont/geosparql#wktLiteral