メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.74954572764 42.9050364128559, 140.750626447197 42.9049854565943, 140.750699400123 42.9062706600104, 140.751163287123 42.9062566953531, 140.751180947491 42.90658614693, 140.749706030765 42.9066600714596, 140.749706582844 42.9066688695359, 140.748579364648 42.9066829865729, 140.748554789637 42.9062960535874, 140.748504120238 42.905474411687, 140.748468931806 42.9050753832141, 140.748602357164 42.9050651784486, 140.74954572764 42.9050364128559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral