メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.361130844057 43.1040027503484, 141.36097298891 43.1046028102889, 141.360425677473 43.1045186030338, 141.360177429172 43.1044883339718, 141.359868139597 43.1044446512407, 141.359344709111 43.1043685007327, 141.359492081469 43.1037710339438, 141.359610529566 43.1032814326573, 141.360156176436 43.1033736479744, 141.361253963216 43.1035211304715, 141.361130844057 43.1040027503484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral