メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358954755781 43.1231574304992, 141.357990089484 43.1230432560468, 141.357708506463 43.1230097743027, 141.357620004334 43.1232733797784, 141.357384470162 43.1232356131973, 141.357441962966 43.1229587567336, 141.357597024114 43.122401978763, 141.35813964859 43.1224616784391, 141.358789068984 43.1225254380437, 141.35889837401 43.1229732947925, 141.358954755781 43.1231574304992)) ^^http://www.opengis.net/ont/geosparql#wktLiteral