メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.900955961332 43.4629870115044, 141.900715923032 43.4630239763834, 141.900601190773 43.4626294614167, 141.900219023156 43.4613810992188, 141.901345285274 43.4611943279127, 141.901570836693 43.4611569307381, 141.901820688888 43.4611200288705, 141.902336726984 43.462774454638, 141.901974305145 43.4628302504709, 141.901699893338 43.462872493572, 141.900955961332 43.4629870115044)) ^^http://www.opengis.net/ont/geosparql#wktLiteral