メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.389184157502 44.1613080156604, 142.388875299389 44.1612407965488, 142.384486630802 44.1607017952239, 142.384212614291 44.1599839294685, 142.384586812032 44.1598229588315, 142.38468168027 44.1598126680285, 142.384817989084 44.1598132300987, 142.385290490705 44.1598213929774, 142.385794243628 44.1598055411443, 142.386030432137 44.1597776443862, 142.386212061125 44.159735274003, 142.386652913447 44.1595897921566, 142.389568926481 44.1600570622313, 142.389184157502 44.1613080156604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral