メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.344527288316 44.4769025410479, 142.341749897643 44.4762199370266, 142.341794752631 44.4761263484689, 142.342198524064 44.4752840215154, 142.342227592413 44.4752225434713, 142.343495417784 44.4755255555957, 142.343611241907 44.4755738010054, 142.344498943702 44.4757871443157, 142.344986127649 44.4759056434309, 142.344562104514 44.4768268896237, 142.344527288316 44.4769025410479)) ^^http://www.opengis.net/ont/geosparql#wktLiteral