Using the meta() function to add metadata to a polygon doesn't work.
julia> poly=Polygon(Point{2, Int}[(1, 1)])
Polygon{2,Int64,Point{2,Int64},LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},Array{LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},1}}(GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}}[], LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}}[])
julia> meta(poly, boundingbox=Rect(0,0,2,2))
ERROR: MethodError: no method matching Polygon(::Polygon{2,Int64,Point{2,Int64},LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},Array{LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},1}})`
julia> polym=PolygonMeta(Point{2, Int}[(3, 1)], boundingbox = Rect(0, 0, 2, 2))
PolygonMeta{2,Int64,Polygon{2,Int64,Point{2,Int64},LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},Array{LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},1}},(:boundingbox,),Tuple{GeometryBasics.HyperRectangle{2,Int64}}}(Polygon{2,Int64,Point{2,Int64},LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},Array{LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}},1}}(GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}}[], LineString{2,Int64,Point{2,Int64},Base.ReinterpretArray{GeometryBasics.Ngon{2,Int64,2,Point{2,Int64}},1,Tuple{Point{2,Int64},Point{2,Int64}},TupleView{Tuple{Point{2,Int64},Point{2,Int64}}, 1}}}[]), (boundingbox = GeometryBasics.HyperRectangle{2,Int64}([0, 0], [2, 2]),))