メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.973069045893 43.5640743320255, 144.970122691084 43.5664568251073, 144.966543821193 43.5641628024353, 144.966732643458 43.5638717667772, 144.967189376545 43.563250896132, 144.967452284975 43.5628786370391, 144.967980333479 43.5621882445011, 144.968492456764 43.5615524792123, 144.96870753357 43.56122210412, 144.973069045893 43.5640743320255)) ^^http://www.opengis.net/ont/geosparql#wktLiteral