メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.75477609863 42.8962785858923, 140.754482336526 42.8962902202532, 140.75433555142 42.894973102842, 140.754303926578 42.8947418608078, 140.754307002684 42.893901509863, 140.756524449317 42.8938113174172, 140.756607416541 42.8946748788764, 140.756674260114 42.8954453912204, 140.756731494604 42.8961027549792, 140.756742635352 42.8962040375825, 140.75477609863 42.8962785858923)) ^^http://www.opengis.net/ont/geosparql#wktLiteral