メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.211372300952 38.4267017624615, 141.211133079763 38.4272071976113, 141.210897866971 38.4277181095328, 141.21087814665 38.4277536473786, 141.210685442399 38.4281727808258, 141.208569686149 38.4275875164013, 141.208443971084 38.4275527267619, 141.208150789337 38.4274717391052, 141.208370684539 38.4269891772745, 141.208598101696 38.4265160227466, 141.208828789157 38.4260017523888, 141.211372300952 38.4267017624615)) ^^http://www.opengis.net/ont/geosparql#wktLiteral