メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.00302916254 34.8944484136863, 137.002880648987 34.8945067579988, 137.001811117072 34.894926926187, 137.000178262067 34.8944557136153, 137.000523389554 34.8943120190783, 137.002833526117 34.8933503678306, 137.003401881057 34.8943019857636, 137.00302916254 34.8944484136863)) ^^http://www.opengis.net/ont/geosparql#wktLiteral