メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.170537676235 43.5290166351091, 142.170955209626 43.5290462411213, 142.170839231363 43.5298093503051, 142.170806723384 43.5301437352443, 142.170733875004 43.5306744640969, 142.170058689385 43.5305987630236, 142.168774889592 43.5305059724961, 142.16870182831 43.5305007174715, 142.165598899647 43.5302395333114, 142.166459759868 43.5296635571863, 142.167568203089 43.5288325925878, 142.168948867406 43.5288870709034, 142.169617184629 43.5289425927698, 142.170272866284 43.5289981020667, 142.170537676235 43.5290166351091)) ^^http://www.opengis.net/ont/geosparql#wktLiteral