Surface/Grading comparison

[alberto_go]

I have 2 surfaces that I've created for a site, one for the Existing condition (EG) and another for the finished condition (FG). Well, I've used the Surface/Utilities/Volumes utility to compare the 2 surfaces. I've got my volume difference, and up to that point everything was fine. Now I am asked to identify the areas that are being filled or cut. Is there a way to visually show on the screen places where it is cutting of filling, as in the Grading? can we show a numerical value for cut or fill, every 10', per say? what's the route that I should take?

[Anonymous]

You need to create a TIN Volume surface that compares the EG and FG
surfaces. This new surface will have a positive elevation when there is a
fill situation and a negative elevation when in a cut situation. You can
use elevation banding to shade cut/fill. Everything below 0 can be shaded
one colour and everything above 0 can be shaded another.

To label cut/fill values you can either use a surface label at various
points or create points on this new surface in a grid pattern.

I can go into a bit more detail on how to do this, unless you'd like to
experiment yourself.

Matt


wrote in message news:5050294@discussion.autodesk.com...
I have 2 surfaces that I've created for a site, one for the Existing
condition (EG) and another for the finished condition (FG). Well, I've used
the Surface/Utilities/Volumes utility to compare the 2 surfaces. I've got my
volume difference, and up to that point everything was fine. Now I am asked
to identify the areas that are being filled or cut. Is there a way to
visually show on the screen places where it is cutting of filling, as in the
Grading? can we show a numerical value for cut or fill, every 10', per say?
what's the route that I should take?

[alberto_go]

Matt,

I've created my EG and FG surfaces (TIN's), and I already compared them to each other to obtain the volume surface difference, and in the Composite Volumes dialogue box it appeares my total amount of Fill, Cut and Net. I guess my question is how to represent graphically the location of that cut and fill.

You said that I could use elevation banding to shade cut/fill. How do you do that for Cut and Fill only?? I've attached a copy of my EG with some elevation banding shades, however, that's not what I am after; How do you show the cut and fill to apply the elevation banding??

Thanks in advance!

[Anonymous]

I think you missed the key point in Matt's response. You need to create a
Volume surface, not just compute the volumes.

When you create a new surface, the pull down in the top left corner allows
you to select which type of surface. Select a volume surface option then
towards the bottom of the dialog box you specify the surfaces to be compared
(be sure to get them in the right order or the data will be backwards.)
From there, set your style as desired, contours, analysis, etc.

wrote in message news:5050595@discussion.autodesk.com...
Matt,

I've created my EG and FG surfaces (TIN's), and I already compared them to
each other to obtain the volume surface difference, and in the Composite
Volumes dialogue box it appeares my total amount of Fill, Cut and Net. I
guess my question is how to represent graphically the location of that cut
and fill.

You said that I could use elevation banding to shade cut/fill. How do you do
that for Cut and Fill only?? I've attached a copy of my EG with some
elevation banding shades, ho
wever, that's not what I am after; How do you show the cut and fill to apply
the elevation banding??

Thanks in advance!

[alberto_go]

Tom and Matt,

it worked just great... just what I was looking for!!.... Thanks a lot for you help!!