メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.822069194476 35.5183375402366, 137.821931743767 35.5181820918513, 137.822044215539 35.518122656013, 137.821956189141 35.5180100880022, 137.821779465215 35.5178084344434, 137.822326903518 35.5175333229889, 137.822707444337 35.5173420570269, 137.823054037781 35.517772296175, 137.822069194476 35.5183375402366)) ^^http://www.opengis.net/ont/geosparql#wktLiteral