メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.920280297828 35.1911532630239, 136.919804045773 35.1911771407521, 136.919800940035 35.1911401613655, 136.919781475561 35.1907392669108, 136.920325548609 35.1907191927917, 136.921210919351 35.1906779853713, 136.921222439061 35.19110611626, 136.920280297828 35.1911532630239)) ^^http://www.opengis.net/ont/geosparql#wktLiteral