メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.331994331696 43.0666225587946, 141.332759832112 43.0667299783446, 141.332697315952 43.0669339243401, 141.332622300297 43.0671784191364, 141.332573164962 43.0673727663076, 141.332455521966 43.0678574460891, 141.331709156578 43.0677460278675, 141.330914373762 43.067639631214, 141.331078198114 43.0669796434563, 141.331217277274 43.0665118068626, 141.331994331696 43.0666225587946)) ^^http://www.opengis.net/ont/geosparql#wktLiteral