メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.938798119712 37.7959358181218, 140.935448946977 37.7958776279807, 140.935493463457 37.7954407842085, 140.935510260561 37.7947085563278, 140.935527380608 37.7945711327201, 140.935589157976 37.7936243531427, 140.935637933398 37.7936055959025, 140.93891725626 37.7925606954835, 140.938798119712 37.7959358181218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral