from Civil to Inventor

The Autodesk enthusiast exile

Civil 3D – Remember the sample lines

Recently I ran across some bugs in Civil cross sections, and we learned a few things.  While studying (using Dana’s and James’ book) I was reminded about a some of these items, and thought I’d mention one.

Sample lines and volume reports

When generating volume reports from cross section data, the only data available for analysis is the data sampled in the Sample Lines.

If you are missing a surface you need to analyze (like the corridor surface), make sure you add it to the Sample Lines set.1-9-2009 8-38-00 AM

“Sample More Sources” button.

Whether it is because you need to add data for analysis, or because you erased cross section views, and suddenly your data is missing from the new Views, this button is the key.


January 10, 2009 Posted by | 2009, Sections | , , , , , , , | Leave a comment

EG Volume Surface calculations

The topic discussed in this post is a routine calculation, usually related to FG cut and fill quantities. Occasionally, a client has some fill stockpiled and wants the volume to determine how much additional fill he or she may need.

The following example is intended to show how to derive a volume of a portion of a surface. The overall procedure involved is the same no matter whether you are performing quantity calculations on FG fill, or simply want to see how much dirt you need to store after digging that goldfish pond you always wanted. (It’s just an example, not a desire! If I can’t cornmeal it and fry it, I’m not digging a pond for it).

The steps involved are fairly simple:

  • Create the sample surface
  • Identify the limits of the volume calculation
  • Create a comparison surface
  • Create a volume surface

Notice in the following image, the Surface named ‘EG-SURF1’. You should be able to identify the 3 mounds piled together, and the data points that established them.

clip_image001 Continue reading

November 6, 2008 Posted by | Surfaces | , , , , , , , , | Leave a comment