メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.42379072117 43.7490316755191, 142.423867369469 43.7500547803735, 142.423323882989 43.7500780480528, 142.422256780733 43.7501126097585, 142.420916508348 43.7501878435036, 142.420915681587 43.7501782630664, 142.420366777521 43.7502096825108, 142.420331152408 43.7497928719478, 142.420285179527 43.7492931846118, 142.42024906473 43.7489083717444, 142.420784346945 43.7488788365135, 142.420799268953 43.7488780232522, 142.422128524102 43.7488046744954, 142.423196061079 43.7487379427942, 142.423751545611 43.7487031958458, 142.42379072117 43.7490316755191)) ^^http://www.opengis.net/ont/geosparql#wktLiteral