メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376947029261 43.7500550495878, 142.376541643871 43.7497793083569, 142.377637314989 43.748884153917, 142.378400744663 43.7496081781701, 142.377615659301 43.7499744075616, 142.377437680569 43.750056493725, 142.377168510126 43.7501575801638, 142.377094081091 43.7501879368836, 142.377069401828 43.7501661489491, 142.376947029261 43.7500550495878)) ^^http://www.opengis.net/ont/geosparql#wktLiteral