メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.846805242245 37.4417059258808, 138.847362213689 37.4423267376318, 138.847932793746 37.442962714638, 138.847619357076 37.4434907834429, 138.847358729347 37.4436872587279, 138.84696243907 37.4436380277526, 138.846906377413 37.4436287580473, 138.846729976128 37.4435998529191, 138.845659385416 37.4434322224964, 138.84585604781 37.4424555066182, 138.845434084889 37.4423801555056, 138.845668560675 37.4414337386591, 138.846241618376 37.4410956901333, 138.846805242245 37.4417059258808)) ^^http://www.opengis.net/ont/geosparql#wktLiteral