メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.327822480636 43.7617113096905, 142.328226741375 43.7618365402993, 142.327920080147 43.762342518601, 142.327601606564 43.7629112664472, 142.327190536873 43.762778637644, 142.326867821559 43.7626853279236, 142.326453358346 43.7625477930497, 142.327083059359 43.7614779563803, 142.327503148616 43.7616106156966, 142.327822480636 43.7617113096905)) ^^http://www.opengis.net/ont/geosparql#wktLiteral