メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.815680138738 35.3109870578841, 136.815350494264 35.3114338532997, 136.814927497626 35.3112214254146, 136.813962147642 35.310744386538, 136.814262416306 35.3102678596533, 136.815390176661 35.310834736162, 136.815680138738 35.3109870578841), (136.814930232736 35.3107193848392, 136.814661515325 35.3105867712401, 136.814450810904 35.3108835568222, 136.814715757413 35.3110191886692, 136.814930232736 35.3107193848392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral