Basic area label

[sjg]

Asked this about a year and a half ago when we converted from Survcadd and still haven't found any solution and now that I've read 2013 is going to include line labeling capabilities by selecting 2 points rather than selecting linework. Is there going to be a way to label an area without creating a closed polyline or parcel, where it works the way a hatch works. So if I selecting in the middle of multiple individual intersecting lines, it labels the area.

[machadt]

Hi Steve,

The only way to label areas in Civil 3D is using parcels and now in 2013 using survey figures as long as the area information shows under the user defined properties of the figure. 

Hope this help.

[Joe-Bouza]

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The only way to label areas in Civil 3D is using parcels and now in 2013 using survey figures as long as the area information shows under the user defined properties of the figure. 

Hope this help.

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Really? I'm not so sure about that.

[sjg]

Not sure why its being shown as solution, I never accepted it as a solution. What I want is lets say four individual lines create a rectangle, I want to pick in the middle of those lines and produce an area label. A label for general purposes. I don't want to create a parcel. Using the same way a hatch works, if you pick a point within intersecting lines, it creates a hatch, but instead of a hatch I want an area label.

[antoniovinci · Accepted solution]

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sjg wrote:
Not sure why its being shown as solution

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I agree, the sweet Tatiana's one is definetely NOT a solution.

A manual workaround could be:

1] _BOUNDARY by pointing inside the four lines, in order to create a temporary poly

2] _FIELD => object => area => last 

3] _ERASE last

[neilyj666]

I'd use Antonio Vinci's manual method, which could perhaps be done as a lisp routine if you are literate in lisp.

[jmayo-EE]

If you like the behaivor of hatches you can use them to get the area and then freeze/hide/don't plot them. Create the hatch and use an mtext object or table with a field to report the area.

[machadt]

Sorry for the confusion, I though that you were talking about a Civil 3D label not an ACAD label.

And I took care of the solution issue.

[tcorey]

Hi Steve,

Here's some LISP code that will do what you are looking for:

(defun AreaLabel()

  (setq textht (getreal "\nEnter text height: "))   (setq p1 (getpoint "\nPick point inside area to label: "))

  (while (and p1)

    (command "bpoly" p1 "")     (command "area" "O" "l")     (setq ar (rtos (getvar "AREA") 2 2))     (command "text" "m" p1 textht ar)     (setq p1 (getpoint "\nPick point inside area to label: "))     )   (princ)   )

This uses the current layer for both the text label and the polyline it creates with bpoly. The current text style must have a 0 height. If you want any of those detail changed, let me know and I can fix it up for you.

Also, I made this to label in sq units, but I can change it to acres, hectares, etc. Do you want some text before or after the value, for example: Area: <<value>> sq. ft.

Tim

[sjg]

Just realized you posted a lisp file. I appreciate it. Not to familiar with Lisp, copied the text into notepad, saved it as a new lisp, ran appload, loaded fine, but not sure what command to use to activate code.

[dana.probert]

I posted this a thread earlier today, but it might be useful here as well.

You can make a line label that shows area:

(see end of this post where I use it for silt fence)

http://civil3drocks.blogspot.com/2006/06/label-style-for-calling-out-elevation.html

[wfberry]

Dana:

Using this same process to get the area of a closed polyline, how can one get an area label to center itself within this figure.  (Similar to a Parcel Label)

Bill

[Anonymous]

What's the command to activate the lisp?

[tcorey]

To run the lisp code, type (arealabel) with the parenthesis. If you're going to use it often, make a new command in your cui and assign it to a ribbon button.

[neilyj666]

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Also, I made this to label in sq units, but I can change it to acres, hectares, etc. Do you want some text before or after the value, for example: Area: <<value>> sq. ft.

Tim

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Can it be modified to read Area: <<value>> sq. m. and (for future personal reference) how is this done??

[jmayo-EE]

I can't believe you folks are messing with a lisp and mtext or dtext and not using C3D labels as suggested. They can be made to read anything you want. They can align to the linework or view, they auto resize.

I have C3D line and curve labels for det dbasin w/ area, 2-1/2 sty dweling Unit w/ area, Deck, Pool, Patio, Terrace, Ridge, swale, berm, first floor w/ elv, garage floor w/ elv, drop curb, perimeter, time of conc, sheet flow, SC flow, gutter flow, limit of grading, slopes, steps, to name a few...

Make a label style and you won't have to type or create the text strings. When the design changes you don't have to recalc, retype/recreate or realign.

[antoniovinci]

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johnm wrote:

I can't believe you folks are messing with a lisp and mtext or dtext

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I think you didn't read the very first OP post...

He wants "a way to label an area without creating a closed polyline or parcel".

To do that, you can use a manual method (like mine) or an automated one (like Tcorey's), period.

I would be glad if you could us prove HOW is doable with C3D labels, sir.

[jmayo-EE]

😮

True, very true. You are absolutley correct Antonio, but I didn't respond to the OP. 🙂

[jmayo-EE]

...and call me crazy but an area requires a boundary, at least mathmatically. 🙂

[antoniovinci]

In my manual way (here again) if you don't perform the #3 point, the area field will change automatically, on changing the boundary geometry, e.g. by means of grips.

To update the field value, please issue a _REGEN