メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.773876283528 35.4452129237684, 136.772500552273 35.4453446882178, 136.771976222543 35.4453281242214, 136.771980372268 35.4453506370705, 136.770393048807 35.4455493742424, 136.770355122004 35.4452899292123, 136.770315630906 35.4450508286209, 136.771894485232 35.4448577687362, 136.772308193955 35.4448116143792, 136.772935628793 35.4448245672682, 136.772927422159 35.444884257048, 136.773050754149 35.4448982132076, 136.773059661416 35.4448271529223, 136.773239967486 35.4448308710265, 136.773829204657 35.4447888734764, 136.773876283528 35.4452129237684)) ^^http://www.opengis.net/ont/geosparql#wktLiteral