メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.860354035011 43.331949974075, 141.860444667188 43.3322540987161, 141.860532094113 43.3325474523072, 141.859640573537 43.3326901431062, 141.859550861418 43.3323746982291, 141.859468639327 43.3320855105258, 141.859240386389 43.3313479776051, 141.86013390686 43.3312131035116, 141.860354035011 43.331949974075)) ^^http://www.opengis.net/ont/geosparql#wktLiteral