メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356465081813 43.7978186598631, 142.356406392854 43.7977695776174, 142.355624815462 43.7972014304337, 142.355351028811 43.7970011067977, 142.355044515354 43.796779663368, 142.354800002844 43.7966054890219, 142.355421776455 43.7961489654732, 142.356028065493 43.7956987110597, 142.356605173453 43.7952895664731, 142.357245887843 43.7948675779634, 142.358853695747 43.7960308760425, 142.357114334934 43.7971861209136, 142.356908749028 43.79748973642, 142.356465081813 43.7978186598631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral