メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.326782622407 37.3880126537422, 140.326018635374 37.3881738034978, 140.325641069347 37.3882399983382, 140.324432983553 37.3877495467876, 140.324537369149 37.3877184194947, 140.325499136145 37.387527737084, 140.326512670565 37.3873349988788, 140.326782622407 37.3880126537422)) ^^http://www.opengis.net/ont/geosparql#wktLiteral