メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908517775437 43.5082560436947, 141.907947588997 43.5083264581961, 141.907000675359 43.5084318171984, 141.906475587723 43.5084122018081, 141.905557531144 43.5082309167319, 141.905320557197 43.5081870220121, 141.905191876161 43.5081632150191, 141.904488463071 43.508032957724, 141.904414344424 43.5074454759031, 141.905178720116 43.5073299873187, 141.908116940745 43.5068609813949, 141.908517775437 43.5082560436947)) ^^http://www.opengis.net/ont/geosparql#wktLiteral