メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.981338127634 43.5661093652288, 144.980514339675 43.5655610614856, 144.981273461351 43.5649621232501, 144.982044644534 43.5643523073856, 144.982920379347 43.5649074788751, 144.982479828406 43.5652244634979, 144.981338127634 43.5661093652288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral