メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.309344400981 43.1049466350522, 141.310032977048 43.1056116182253, 141.309653624981 43.1058201898116, 141.309488098933 43.1059111702055, 141.309318021721 43.1060047145443, 141.308975604361 43.1062078911741, 141.308602813571 43.1058502319765, 141.308271175142 43.1055319435002, 141.307931424244 43.1052172447149, 141.307587101066 43.1048691007483, 141.307934480183 43.1046862924612, 141.308276979513 43.1044960587195, 141.308660108676 43.1042912488767, 141.309344400981 43.1049466350522)) ^^http://www.opengis.net/ont/geosparql#wktLiteral