メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.403834187329 43.7600882816504, 142.403912491853 43.7606571852627, 142.401580803079 43.7607824362577, 142.399895515207 43.7608575787515, 142.399833744516 43.7603033472516, 142.399715599858 43.759272338619, 142.400583658806 43.7592321115338, 142.401598517914 43.7591758269548, 142.40296923793 43.7591232641979, 142.403732458365 43.7590765065102, 142.403788717755 43.7595681556302, 142.403834187329 43.7600882816504)) ^^http://www.opengis.net/ont/geosparql#wktLiteral