メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.923515831156 37.7571838857403, 140.923391419813 37.7571825023224, 140.9232197437 37.7571686024728, 140.923072249726 37.7571350508543, 140.922894215161 37.7570622206508, 140.923127803409 37.7565456291895, 140.923445277062 37.7566046400578, 140.923528050985 37.7566324535852, 140.923700019075 37.7567691156941, 140.923515831156 37.7571838857403)) ^^http://www.opengis.net/ont/geosparql#wktLiteral