メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.797867378689 35.4432064574254, 136.796472311828 35.4430540009505, 136.796951759771 35.4396361004586, 136.79833146732 35.4398704413463, 136.797867378689 35.4432064574254)) ^^http://www.opengis.net/ont/geosparql#wktLiteral