Friday, June 02, 2006

Table that Lists Area and Volume at a Contour Elevation

Here is a procedure to help you make a surface contour table style that will produce a listing of contour areas and volumes.

The screen captures are directly from Civil 3D 2007, but the process should be the same in 2006.

As always, please let me know if I missed something or if this is not what gets the job done.

I have a simple surface that represents a pond.




Go into the Toolspace>Settings Tab and make a new Surface Table Style under Contour.























Bring in your table.








Note that the table is blank right now. Any time you do a surface analysis, you have to “crunch” the numbers for the table to populate with data about that specific surface.

“Crunch” the surface under the analysis tab.





Note that technically speaking, the area and volumes listed are for each range of elevation, i.e. the area between elevation 1 and 2 for example. If that doesn’t get you what you need, you can make ranges like 10 to 10.000001

Also, you can make an object style that shows off the analysis we just did. I won’t capture that here, but if you are familiar with surface styles, it isn’t hard at all.

Alternatively, you can do an elevation banding style and elevation area table to get the job done.

5 Comments:

jpostlewait said...

I like the new format.
I looked for the health and beauty
tips didn't really find any.
Maybe a bug in search?
I've had my fill of corned beef hash.

Anonymous said...

Very pretty design! Keep up the good work. Thanks.
»

Craig from CVIS said...

This seems to do something other than the desired action -- the volumes are calculated down to datum in every case, rather than just taking the volume between the contours. In other words, the analysis makes temp volume surfaces that are constrained by the contours in X and Y, but not in Z. So the volume ends up being very close to [2D area]*[average elevation].

Dana Breig Probert, EIT said...

you are right. i have been meaning to yank this post since i discovered that what it does is the area of TIN and not the contour areas.

for a way to get the contour areas TRULY- visit
http://www.civil3d.com/index.php/2006/09/areas-of-contours-for-stormwater-calculations-for-now/#more-112

Brandon said...

use the Stage Storage add-on for the toolbox (for subscription users. It will spit out a table of 2d areas by just selecting the surface or polylines, its great