メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.873551163076 35.8339971458374, 139.873431977305 35.834408199847, 139.87276986761 35.8342712987357, 139.872890848805 35.8338870160838, 139.873551163076 35.8339971458374)) ^^http://www.opengis.net/ont/geosparql#wktLiteral