The surface chart gives the effect i'm after but only for 1 cross
ssection. If you imagine the a chart with 3 axis ideally i want the x
axis to show the points across the width of the road and the y to show
the level at that point. then on this would be the 2 series, existing
ground level and proposed groundlevel, making it easy to see the
difference. the main effect i'm after is to have the z axis say 10
different points on it with each one displaying a cross section, i.e.
to show the cross sections in the order they apear on the road. then
one step further if possible i'd like the cross sections to link and
produce a 3d image of the whole road rather than a cross section
through it