メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.346986207501 43.0349857268952, 141.347821101247 43.0350489289665, 141.347736023939 43.0357191392036, 141.347640873006 43.0363831490401, 141.346306212154 43.0362906090781, 141.345667764272 43.0362459696634, 141.345739572131 43.0356910697007, 141.345758367491 43.0355535815657, 141.345799327786 43.0352712482378, 141.345855066088 43.0349030878344, 141.346470294041 43.034948035547, 141.346986207501 43.0349857268952)) ^^http://www.opengis.net/ont/geosparql#wktLiteral