メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347915691422 43.077060718654, 141.347776758746 43.0776302737485, 141.34763248951 43.078203652304, 141.346035771127 43.0779664047758, 141.346032036931 43.0779658837244, 141.346173735891 43.0774247673082, 141.346303776737 43.0768867222375, 141.346314351776 43.076846084665, 141.347915691422 43.077060718654)) ^^http://www.opengis.net/ont/geosparql#wktLiteral