メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.943668579885 38.1793047532873, 140.94208465924 38.1793126681854, 140.941632750052 38.1784758690856, 140.941554955659 38.1783317824057, 140.940957517948 38.1772263648589, 140.943438811231 38.1780885026736, 140.944963012196 38.1786033327903, 140.943668579885 38.1793047532873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral