メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.359881605281 43.0698358018188, 141.359791462938 43.07021804603, 141.359780728916 43.0702637468069, 141.358252174739 43.07005330458, 141.358367334072 43.0696135865792, 141.358525777517 43.0690266553079, 141.358589258164 43.0687568735337, 141.360158258357 43.0687090918937, 141.360044885229 43.0692386370733, 141.359881605281 43.0698358018188)) ^^http://www.opengis.net/ont/geosparql#wktLiteral