メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.7020231188 44.3634054615732, 141.701720169149 44.3635984952239, 141.700966238081 44.3640971945334, 141.700808881716 44.3639705361103, 141.7003730315 44.363632575036, 141.699994770822 44.3633311725299, 141.699900160471 44.3632606483705, 141.700986074182 44.3625507835673, 141.701020412265 44.3626100846577, 141.7020231188 44.3634054615732)) ^^http://www.opengis.net/ont/geosparql#wktLiteral