メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.261447257023 44.0242433340724, 144.261352129659 44.0243696016679, 144.259919856755 44.0241003834038, 144.259977302987 44.0240182026485, 144.260319576194 44.0235234660029, 144.260326459169 44.023513732034, 144.261620965626 44.0239684647475, 144.261447257023 44.0242433340724)) ^^http://www.opengis.net/ont/geosparql#wktLiteral