AutoCAD Civil 3D

[#1]

I've got a drawing in which the existing ground is so jaggedy that I've got way too many grade breaks (see the attached image).  I know I can use the weeding and eliminate the labels every 50 feet, or so, along the profile.  But I need to have the ability to only show a specific grade break range.  For instance, I'd like for my profile only to display grade breaks between 0% and 2% and not to display anything above 2%. I've tried making an expression, but have been hitting brick walls.  I also know I can manually (use the CTRL + click) select the specific labels that I don't want and erase them, but I've got lots of these labels.  Is there anyone out there (much more savvy at this than I) who knows of a LISP routine or an expression that can accomplish this? 

[#2 · Accepted solution]

I learned this just the other day, thanks to Jeff_M.

IF(ABS({Grade Change})<=2,0.10,0)

Then, in the label style, instead of using a fixed text height, use the expression name. It will be available in the list where you give text height for the components.

[#3]

Thats what I call a golden nugget

[#4]

Tim,

Amazing!  I was using the wrong set of codes for the expression and was attempting to use it in the completely wrong area.  Thank you very much!

One more question, does your buddy Jeff_M also have a the code for filtering out the percent grades along the profile. I'll play with the expressions again but thoght I'd ask anyway. 

Regardless, thanks for the response. 

Jason

[#5 · Accepted solution]

To filter the label by slope, make an expression under Profile-->Label Styles-->Line.

IF(ABS({Tangent Grade})<=0.02,0.1,0)

Use this expression as the text height in the label style. To filter on different value than <= 2%, adjust the first number, where I put 0.02. Four and a half percent would be 0.045, etc.

[#6]

The expression is the best way to filter the grade labels by percent but there is another way to simply reduce the number of labels. You all probalby know this but just in case,

In the profile properties dialog, bands tab, add a label weeding factor to the band. This will not filter by slope but if you just want fewer labels this tool is provided.

[#7]

Tim,

You solution worked GREAT! ! ! !    After creating the expression, I went into my "percent grade" label style.  I verifired that the expression was set for Tangent Grade.  For the text height i set the value to be the name of the expression.  In your expression code I had to change the text height value form:

• IF(ABS({Tangent Grade})<=0.02,0.1,0)
  to
• IF(ABS({Tangent Grade})<=0.02,0.01,0)

After that was set my labels are filtered perfectly and the text height is correct.  Not sure why the text height must be set to 0.01 in order for the text to appear 0.1 in heigt, but I don't care.  It works. 

Thanks for all your input,.

Jason

[#8]

This works great! 

But how would I show something other than 0%-2% like 1%-5% or something like that.

Thanks

[#9]

This is for showing only 1% thru 5%:

IF(ABS({Tangent Grade})>=0.01,(IF(ABS({Tangent Grade})<=0.05,0.01,0)),0)

Adjust the 0.01 to work with your text size. For imperial drawings, if your normal text height in the style composer is 0.10", then this should be 0.10/12.

[#10]

C'mon, Jeff. I was getting all that credit for your solution and now you stick your nose in here...