メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370356724977 43.0750388697477, 141.370460550031 43.0753726068647, 141.369981491875 43.0757309105805, 141.36961401295 43.0759947744321, 141.369143693987 43.0764253708018, 141.368993218432 43.0763614796699, 141.369010000606 43.0763351649557, 141.36847494583 43.0760076718718, 141.368762221733 43.0757106316813, 141.369076129434 43.0755164770804, 141.36941461274 43.0753211738472, 141.36973504104 43.0751269965297, 141.370271245955 43.0748041568012, 141.370356724977 43.0750388697477)) ^^http://www.opengis.net/ont/geosparql#wktLiteral