メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.904820171849 43.4710295252054, 141.904725804099 43.4710429908191, 141.904715680693 43.4710446482076, 141.904284611728 43.4693400232149, 141.905736023426 43.4691012307253, 141.907648627832 43.4688111569721, 141.907951973384 43.4697955814994, 141.908171256704 43.4705275032748, 141.906765009791 43.4707409688792, 141.906241421388 43.4708204537363, 141.9058810437 43.4708788354547, 141.905617273357 43.4709240022073, 141.905097283935 43.4709900262802, 141.904820171849 43.4710295252054)) ^^http://www.opengis.net/ont/geosparql#wktLiteral