メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.661521200141 42.8448574613492, 141.662000884458 42.8455810518065, 141.662314293061 42.8460145765324, 141.660682242027 42.8466012497324, 141.659130336271 42.8471697451797, 141.65883972405 42.8467429415644, 141.658350643452 42.846046230006, 141.658108738296 42.8456651124488, 141.657574281848 42.8448476832097, 141.658065842764 42.8446627229513, 141.65917425091 42.8442492054091, 141.660100195704 42.8439154813168, 141.66069630245 42.8436961668744, 141.661521200141 42.8448574613492)) ^^http://www.opengis.net/ont/geosparql#wktLiteral