メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.881615880654 35.1202367108056, 136.881107144882 35.1202469655224, 136.88110906441 35.1198278110629, 136.881110795713 35.1194525442853, 136.882994508029 35.1194451616069, 136.883065335675 35.1198415201053, 136.883139027498 35.1202298692823, 136.882378362496 35.1202369214869, 136.881615880654 35.1202367108056)) ^^http://www.opengis.net/ont/geosparql#wktLiteral