メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.184418344784 35.3621603834301, 137.184068484399 35.3625813477142, 137.1837814075 35.3629187111119, 137.182310210472 35.3620559348954, 137.182624463379 35.3616839944972, 137.18295498406 35.3612881786738, 137.184418344784 35.3621603834301)) ^^http://www.opengis.net/ont/geosparql#wktLiteral