3d polylines

[Seth04]

I would like to know if it is possible to create a 3d polyline using cogo points without drawing a new polyline from point to point. In the past I used software that would allow me to put a cogo point with elevation along existing lines and arcs and convert them to 3d polylines. I am a Land Surveyor and I used this function frequently in the past to while creating stakeout files to avoid manually calculating grade along lines.

[doni49]

Certainly.

Home Tab>Draw Panel:

When prompted for a range, enter your point numbers.  A few examples:

1-100 (This will draw polyline though all the points in this range).

1-10, 20-100 (this will SKIP points 11-19)

[doni49]

Also -- if you are wanting to SELECT the points (as opposed to typing in the range) then use "Create by Point Object" which is right below the point range option.

[Postmaster_G]

You can type in the following for cogo points 11-35 for example...

3DPOLY [enter]

'PN [enter]

11-35 [enter]

esc [enter]

Hope that helps

G

[Seth04]

Thank you for your response. However that does not do exactaly what I am looking for. I have attached an image to help explain what I am looking to do. I can calulate each point that says "Grade Needed" but on a large project it can become very time consuming and lead to mistakes. What I am looking to do is create a Cogo point with elevation on each of the grades labeled in Red. I should then have the ability to change the existing line into a 3d polyline from the Cogo points I created. I should then be able to come back and pick a Cogo point on the polyline where it is labeled "Grade Needed". The grade should be automatically interpolated. I often get large construction staking jobs that require me to create a grade at each corner or pc and pt of curves. The ability to create a 3d polyline quickly is very helpful.

[sjg]

I would suggest using feature lines, you can create a feature line and interpolate vertices between known elevations. There is a lot more functionality with featurelines than 3d polys.

[Seth04 · Accepted solution]

Feature lines seem to be the way to go. I am able to create them from my existing polylines which is great but I am having a little trouble assinging elevations. Using the same example from an earlier qeustion, my thought process is I should be able to use the Quick elevation edit in the feature line editor and assing elevations at all of the know points,labeled in red. However when I try this I am able to pick a first point and assing the first elevation then I am ask for a site or reference point, I have used reference point and picked the next point. I then enter E for elevation and it creates an elevation at that particular station. It does not interpolate the elvation for the stations before so I am left with elvations at my known points and 0 elevations at the points I need to be interpolated.

[Citadel2012]

I think you need to use the "Set grade/slope between two points," where you can select points on either side of an unknown and tell the feature line to interpolate the unknown elevation.

 

[Joe-Bouza]

1. if you choose to create from existing poly line >> make a surface from you points >> FL elevations from Surface.

2. or draw the FL using transparent tool bar through the cogo points like you did with the poly line.

Now make a feature line lable style that shows the grade along the segments. No guessing