メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.259250028237 43.1362614204148, 141.258670911497 43.1366449010416, 141.258187612751 43.1370110670698, 141.256604685899 43.1358659232798, 141.256559048545 43.1358317000369, 141.257094750002 43.1354676085995, 141.257668507851 43.135083519651, 141.259250028237 43.1362614204148)) ^^http://www.opengis.net/ont/geosparql#wktLiteral