topic Re: How to Get Data Points from Existing Contour lines in Civil 3D Forum

How to Get Data Points from Existing Contour lines

s20215430 — Sun, 26 Nov 2023 16:10:48 GMT

hey i have this project im working on, where i need to design a road. I was given a file that has a contour map. i am not sure how to get started because i would like to get the data points derived from the contour map. Can anyone help me with this?

Re: How to Get Data Points from Existing Contour lines

Pointdump — Sun, 26 Nov 2023 19:45:45 GMT

Hi Danai,
Welcome to the Autodesk Forums.
Your drawing already has a surface, so the next step will be to create an alignment.
Dave

Re: How to Get Data Points from Existing Contour lines

s20215430 — Sun, 26 Nov 2023 20:17:20 GMT

Is it possible to get all of the points on the contour in a text file, showing x, y, and z values.

Re: How to Get Data Points from Existing Contour lines

Pointdump — Mon, 27 Nov 2023 07:58:44 GMT

Danai,
You want to extract the polyline vertices? I don't think data extraction can do that. I might be wrong.
You can extract the 441,404 surface points.
More details please on what you'd like to do.
Dave

Re: How to Get Data Points from Existing Contour lines

s20215430 — Mon, 27 Nov 2023 08:35:47 GMT

I would like all of the points along the contours extracted and in a .csv file so i can upload the points into other projects as new points.

Re: How to Get Data Points from Existing Contour lines

Pointdump — Mon, 27 Nov 2023 09:37:54 GMT

Here you go. 482,739 points! I wasn't able to extract the vertices in AutoCAD, so I used QGIS. Very convoluted. Maybe someone will chime in with a better way.
Extracting the 441,404 surface points would be far easier.
Dave

Re: How to Get Data Points from Existing Contour lines

s20215430 — Mon, 27 Nov 2023 09:41:47 GMT

How would one extract the surface points efficiently?

Re: How to Get Data Points from Existing Contour lines

Pointdump — Mon, 27 Nov 2023 09:58:46 GMT

Danai,
In your drawing, Turn on "C-TOPO" layer, turn off "CONTPRINCP" and "CONTREGULR" layers.
In your Surface Style, turn on "Points". Select your Surface. Extract Points.
Dave

Re: How to Get Data Points from Existing Contour lines

Pointdump — Mon, 27 Nov 2023 10:07:18 GMT

Danai,
I forgot to add the last step, DATAEXTRACTION.
Dave

Re: How to Get Data Points from Existing Contour lines

s20215430 — Mon, 27 Nov 2023 14:57:10 GMT

Thank you so much, you have been such a big help!!! I hope all your future endeavors go as smoothly as our interactions. Good luck!

Re: How to Get Data Points from Existing Contour lines

Jeew-m — Tue, 28 Nov 2023 06:14:44 GMT

Hi,

If your first task is to create a surface, You can easily do it through these contours.

No need to extract points data at all.