メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.91279125617 43.5139003442097, 141.912964554704 43.5144358603617, 141.91272731798 43.5144728909637, 141.911930422952 43.5145972317116, 141.911764640555 43.5140367693591, 141.911580133673 43.5134130291457, 141.911541776559 43.5132833390838, 141.912037426914 43.5132010827019, 141.91214342855 43.51318349782, 141.912545989317 43.5131166812442, 141.91279125617 43.5139003442097)) ^^http://www.opengis.net/ont/geosparql#wktLiteral