メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.096161493021 39.6797372053321, 141.09464549058 39.679820320203, 141.093420767315 39.6798768693604, 141.093305953593 39.6788362900659, 141.097269814153 39.6786472328159, 141.096942773126 39.6797095005849, 141.096161493021 39.6797372053321)) ^^http://www.opengis.net/ont/geosparql#wktLiteral