メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.303018536265 43.7626423180217, 142.300174223936 43.7628055364096, 142.298144852439 43.7629308791732, 142.298124435332 43.7629321362414, 142.297204059317 43.7630066926199, 142.296743054839 43.7630428346539, 142.296695171208 43.7627503340975, 142.297513220139 43.7620168801347, 142.298377877928 43.761302913543, 142.30116538532 43.7612551782342, 142.301151051298 43.7620226196936, 142.302948140882 43.7620380789435, 142.303018536265 43.7626423180217)) ^^http://www.opengis.net/ont/geosparql#wktLiteral