メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364337045027 43.0698266875111, 141.363181377299 43.0696681488136, 141.363470461587 43.0686395670871, 141.364668786766 43.0686257036367, 141.364337045027 43.0698266875111)) ^^http://www.opengis.net/ont/geosparql#wktLiteral