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3d ground profile

Printed From: CAD Forum
Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DWF formats, Design Review, AutoCAD 360, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=3803
Printed Date: 01.Jun.2026 at 07:39


Topic: 3d ground profile
Posted By: pizzle
Subject: 3d ground profile
Date Posted: 27.May.2010 at 11:12

i seem to be having great difficulty with this simple task... please help!

 
i need to create a 3d model of an area of land to show how flat (or not flat) it is.  I have point data covering the area of interest that has the 'z' value already entered so all i need to do is create a 3d surface from this information right?
 
how does one do this?
 
Many thanks for any help


Replies:
Posted By: CarlB
Date Posted: 27.May.2010 at 20:23
It's not a simple task. To do it properly, accuratetly, that would stand up in court, you need information provided by a registered surveyor; a ground model created using industry-standard/approved software such as Civil 3D, eaglepointe, several others; performed by someone with the necessary training.
 
OK if you just want a 3d representation you can manually draw elevation contours through the points, make polylines, use methods (autocad commands) to convert to a surface or solid.
 
More accurately & automated & cheap, download program from http://www.sitetopo.com" rel="nofollow - www.sitetopo.com
 
 

Posted By: pizzle
Date Posted: 28.May.2010 at 11:46

thanks for the reply.

 

we did actually used to use civil 3d but had to get rid of it due to lack of use (hence the question) but i think i've found the solution now. 

 

It was only a small area of a site that needs to be modeled so i simply added the z value to the relevant points and used a plugin called 'Point Cloud' that effectively droops a mesh over the points to create the surface. Bit of a ball ache though as i had to manually input the z data, but got there in the end!

 

Cheers


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