メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.898577390021 43.3366932509123, 141.898882275422 43.3372402209001, 141.899195964563 43.3377904536372, 141.897296268325 43.3383384595066, 141.896202664913 43.338664052633, 141.895602475106 43.3370519292305, 141.896188937615 43.3368545575679, 141.896990172958 43.3366059957732, 141.897008996155 43.3366001458637, 141.898329117587 43.3362459692565, 141.898577390021 43.3366932509123)) ^^http://www.opengis.net/ont/geosparql#wktLiteral