メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908373928735 43.5265901192089, 141.907441656964 43.5267351453712, 141.905886549604 43.5269738562248, 141.905556237761 43.5272639377307, 141.904992442978 43.5253205309511, 141.904713494394 43.5243888178812, 141.904666431295 43.5241943640926, 141.905183037647 43.5236843408285, 141.906012290958 43.5228283756669, 141.907157434805 43.5226446169483, 141.907240380552 43.5226313285695, 141.908373928735 43.5265901192089)) ^^http://www.opengis.net/ont/geosparql#wktLiteral