メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.030068383083 43.5639715205523, 142.029291462912 43.5645570501706, 142.028666084416 43.5640250325785, 142.028839220052 43.5637602690084, 142.028991864015 43.5635519043733, 142.02908394734 43.5632894474931, 142.029431535112 43.5633097684752, 142.029603296946 43.5634131943666, 142.030264590769 43.5634905475264, 142.030619657471 43.5635491713445, 142.030068383083 43.5639715205523)) ^^http://www.opengis.net/ont/geosparql#wktLiteral