Urgent help needed "Pipline Topo"

[Anonymous]

Hi every body,

I have my pipeline profile in x and y coordinates only. The topo plan is 3D and have x, y and z coordinates. Is there any way to get the corresponding z values for the pipeline from the topo. By the way I have AutoCAD general only.

Thanks

[Anonymous]

Hi imtaha,

Could you clarify the following so that we understand the question and situation better to help you here :

1. By the way I have AutoCAD general only >>> Does it mean you are using plain AutoCAD and not AutoCAD Map 3D ?

2. The topo plan is 3D and have x, y and z coordinates >>> What format is this Topo plan ? Is it a DWG with contours ?

Thanks,

[Anonymous]

Thanks for your reply. Yes I have plain AutoCAD, but I recently installed a trial version of AutoCAD MAP 3D. Yes the topo plan with contour lines in 3D (They have elevations, z values). What I want is to divide the 2D pline into say about 2000 points, and then get the corresonding z value for each point by using the contour lines if it the point apparently falls on the contour line, or by interpolating between two contour lines if it falls between two contour lines, which is most probably the case in most of the points. I hope that will further clarify my problem.

Thanks

[Alfred.NESWADBA]

Hi,

>> I recently installed a trial version of AutoCAD MAP 3D

If you have just 30day-versions ... what will happen if you need to modify anything after these 30day's? ;(

Anyway in case of using demo-versions ==> take Civil3D instead of Map3D, there you can create a surface based on your 3d-data and then project your 2D-Polylines (pipes) onto the surface (if that is the goal, in normal cases the pipes are beyond the ground, but maybe your 3d-data represent already pipe-elevations).

- alfred -

[Anonymous]

Thanks for you reply Alfred.

Can you please tell me in step by step how I can create a surface from my 3D data and how to project the 2D poly line on the surface. I will really appreciate that.

Thanks

[Alfred.NESWADBA]

Hi,

if it's a one time job ==> upload the drawing with your 3d-data and your 2d-pipelines and you get back the projected polylines. That makes it more efficient than describing all the steps necessary if you are not familiar with Civil3D.

- alfred -

[Anonymous]

I would like to learn how to do it myself. Also we have a number of them, so if you show me how to do it that's would be great.

[Alfred.NESWADBA]

Hi,

>> so if you show me how to do it that's would be great.

I don't see the data you have (points, blocks on z=0, blocks on correct z, 2d-poly, 3d-poly, lw-poly, lines, any info to use as breaklines, ....) so I would have to rewrite the tutorial here. For that (sorry!) it's not the right place and also I don't have time enough to write now something with all possible geometry-options .... that's why manuals have hundreds of pages.

One tip at the beginning: learning Civil3D is not a thing of 2 hours, plus there are great tutorials prepared you can walk through (the tutorials are installed with Civil3D-installation), start >>>here<<<.

Please understand my exercize restraint, but there are two much options you can go/you need for your data to handle all options in a forum ... a forum is no classroom. 😉

- alfred -

[Anonymous]

I have 2D poly line.

[Alfred.NESWADBA]

Hi,

just two of your statements:

>> The topo plan is 3D and have x, y and z coordinates (from your first post)

>> I have 2D poly line (from your previous message)

And if I interpret "2D poly" as "2D-Polyline" (as the object type name in AutoCAD is displayed) with elevation ==> are these polylines "splined" or "fit curved"?

Are these polys representing contours or breaklines?

...do you see the necessarity for others to look at the data (and not to guess or reask every detail that's necessary)?

- alfred -

[Anonymous]

Ok you may consider it 2000 points that represent a pipeline.