メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.426302805602 43.7689910801734, 142.42573377979 43.7690291816581, 142.425629067298 43.767988553273, 142.426320686519 43.7679713977773, 142.426205699279 43.7669334937761, 142.426331116879 43.7669265167368, 142.427368899437 43.7668688487299, 142.428331431478 43.766815330625, 142.428547630963 43.7688732786894, 142.428285994278 43.7688840010025, 142.427797975839 43.7689040205943, 142.427294957275 43.7689246398537, 142.42678827668 43.7689585717344, 142.426302805602 43.7689910801734)) ^^http://www.opengis.net/ont/geosparql#wktLiteral