メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.196849505632 35.3595783672165, 137.198542226535 35.3603493098463, 137.198267892524 35.3607795943102, 137.196633385418 35.3599953966612, 137.195291183175 35.3593442937599, 137.195456905171 35.3591148867227, 137.196196726814 35.3593580273949, 137.196849505632 35.3595783672165)) ^^http://www.opengis.net/ont/geosparql#wktLiteral