メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36676342726 43.0843458239953, 141.367060632795 43.0843893293312, 141.367632627926 43.0844672348549, 141.367494869509 43.085026058853, 141.367356749678 43.0856098479498, 141.367024602877 43.0855669874287, 141.366353718687 43.0854724923332, 141.365824198906 43.0853963163118, 141.365966141066 43.0848212098543, 141.366043890831 43.0845125746986, 141.366109484418 43.0842485750951, 141.36676342726 43.0843458239953)) ^^http://www.opengis.net/ont/geosparql#wktLiteral