メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.246244288878 43.1018995487014, 141.245004265377 43.1030256800369, 141.244241688153 43.1024460891504, 141.243891116875 43.1022854724259, 141.244968237292 43.1012146741017, 141.245289603614 43.1010657941806, 141.24641413462 43.1017312616862, 141.246244288878 43.1018995487014)) ^^http://www.opengis.net/ont/geosparql#wktLiteral