*koc, izmen
Message 1 of 4 (220 Views)

# volume calculation between different elevation.

220 Views, 3 Replies
10-19-2003 05:22 PM
Hi,
there is a attachment. pls look.

I have two surface and I calculated volume between two surface.
I defined a parcel . this parcel elev is between 1450 m and 1460 m.
I just want to calculate the wolume boundaried by this parcel. how can I
calculate volume of a parcel which has different elev.
*bouza, Joe
Message 2 of 4 (220 Views)

# Re: volume calculation between different elevation.

10-19-2003 09:39 PM in reply to: *koc, izmen
terrain/Volume/parcels ?
"izmen koc" wrote in message
> Hi,
> there is a attachment. pls look.
>
> I have two surface and I calculated volume between two surface.
> I defined a parcel . this parcel elev is between 1450 m and 1460 m.
> I just want to calculate the wolume boundaried by this parcel. how can I
> calculate volume of a parcel which has different elev.
>
>

----------------------------------------------------------------------------
----
*Cannon, Steve
Message 3 of 4 (220 Views)

# Re: volume calculation between different elevation.

10-20-2003 01:14 AM in reply to: *koc, izmen
Hi.

Method 1 (assumes a fill volume only between Surface1 and Surface 2 as
depicted by your sketch). See revised sketch below:

- Create a parcel depicting the desired horizontal computation limits, but
within the outer-polylines.

- Make a 4 point surface (from an outer polyline at elev 1460), call it
surface1460.

- Make a 4 point surface (from an outer polyline at elev 1450), call it
surface1450.

- Create Stratum A where #1 = surface1460 and #2 = surface1.

- Create Stratum B where #1 = surface1450 and #2 = surface1.

- Terrain / Composite Volume / Parcel Volumes, Stratum A

- Terrain / Composite Volume / Parcel Volumes, Stratum B

- Parcel Fill Volume = Fill B - Fill A. (ignore any cut volumes).

If you have to repeat this process over and over for different parcels and
elevations, this routine could be customized using VBA.

Method 2. (will handle both cut and fills within the horizontal parcel
limits)

- Surface1: Import Contours between 1450 and 1460 (Use a small contour
interval like 0.1).

- Make surface from contours, using the parcel boundary as the outer tin
boundary. Call resultant surface, surfaceC.

- Make a 4 point surface (from an outer polyline at elev 1450), call it
surface1450.

- Create Stratum C where #1 = surface1450 and #2 = surfaceC.

- Run composite volumes (parcels not necessary) for Stratum C.

You may want to look at an alternative to creating surfaceC from imported
contours (which are really interpolated data), you could create it from a
point group consisting of points whose elevations are between 1450 and 1460
(actual data).

As an alternative to Composite volumes, you could modify Method2 by creating
an alignment down the center of the parcel, then extracting multiple
sections from surfaceC and section1450, and finally computing average-end
volumes between the two surfaces.

Method 3

- Apply the parcel boundary to Surface1, and turn contours into an inverted
pond. Run a stage storage volume (assumes Civil module). You can sum the
volumes between 1450 and 1460. Depending on the shape of surface1,
especially limited by the parcel, this approach may not yield desired
results.

sc

"izmen koc" wrote in message
> Hi,
> there is a attachment. pls look.
>
> I have two surface and I calculated volume between two surface.
> I defined a parcel . this parcel elev is between 1450 m and 1460 m.
> I just want to calculate the wolume boundaried by this parcel. how can I
> calculate volume of a parcel which has different elev.
*koc, izmen
Message 4 of 4 (220 Views)

# Re:

10-20-2003 07:59 PM in reply to: *koc, izmen

### You are not logged in.

Announcements
Are you familiar with the Autodesk Expert Elites? The Expert Elite program is made up of customers that help other customers by sharing knowledge and exemplifying an engaging style of collaboration. To learn more, please visit our Expert Elite website.