メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.59846929293 42.6282774261263, 141.600117995239 42.6284755740517, 141.599682897832 42.6291028950653, 141.599440533531 42.6294873819158, 141.598479959393 42.6293463138509, 141.598113335165 42.6292765656465, 141.597542801862 42.6290568217322, 141.597024302983 42.6295010641872, 141.596978040088 42.6295348425754, 141.596326095153 42.6291500429036, 141.596764615668 42.6286861037007, 141.597294561501 42.6281254257221, 141.59846929293 42.6282774261263)) ^^http://www.opengis.net/ont/geosparql#wktLiteral