メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.381549521614 43.7853681726303, 142.380830631243 43.7855768408911, 142.380381841292 43.7857068796467, 142.380007848617 43.7858157540198, 142.379448472564 43.7848065697569, 142.379802465088 43.7846979125268, 142.380244989778 43.7845851294556, 142.38099168922 43.7843717752914, 142.381549521614 43.7853681726303)) ^^http://www.opengis.net/ont/geosparql#wktLiteral