メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.920303113227 43.5820832974231, 141.918013770778 43.5826217099462, 141.916296689555 43.5830399488045, 141.915312574502 43.5832550720707, 141.91516357945 43.583091337397, 141.9150448131 43.5829763565807, 141.914979411351 43.5827848073199, 141.91500684483 43.5826302761564, 141.915405610455 43.5820554079044, 141.91541230949 43.5820684026748, 141.915523962954 43.5819077193645, 141.915525325193 43.5819106066186, 141.919666948087 43.5810032847514, 141.919772127213 43.5809762676132, 141.920303113227 43.5820832974231)) ^^http://www.opengis.net/ont/geosparql#wktLiteral