メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.870908184598 41.4175414291346, 140.862212248341 41.4182368172507, 140.85342923379 41.4045717723257, 140.850829413201 41.3989852626191, 140.849884123419 41.3968417753625, 140.863142435665 41.395719690498, 140.870908184598 41.4175414291346)) ^^http://www.opengis.net/ont/geosparql#wktLiteral