Snapping to an elevation on a 3d polyline

[sbullinger]

Can anyone tell me a way to snap to an elevation on a 3d polyline?

[Wanderer]

Can anyone tell me a way to snap to an elevation on a 3d polyline?

sbullinger, could you please tell me what program you are using so that I might move this post to the appropriate location for getting an answer?

thank you.

[sbullinger]

Land 2004 w/ Civil, and Map 2004

[Glenn Pope]

Hi sbullinger

Please note that I have moved this thread from the New Forum User forum to this one. I believe it would be better suited here.

Thanks

[Glenn Pope]

You should be able to use any of the object snaps to snap to a 3D poly. Unless you have a Z filter in place.

[sbullinger]

One end of the 3d polyline is at an elevation of 892.00 and the other end is at 904.00 and I want to snap to an elevation of 895.00. Any thoughts?

[Ammon]

One end of the 3d polyline is at an elevation of 892.00 and the other end is at 904.00 and I want to snap to an elevation of 895.00. Any thoughts?

You would have to use a slop calculator to tell you how far from one end 895.00 would be.

I use an Excel Spreadsheet to do it for me, but the basic formula is s=h/d where s=slope, h=height, and d=distance.

I set myself up a spreadsheet where each variable can be calculated. You want to first calculate the slope then calculate the distance to the specific elevation.

Here is my spreadsheet if you want to use it. If not, you can make your own.

After you have that distance, draw a circle with it as the radius. Snap to the intersectio of the circle and the 3Dpolyline, selecting the 3Dpolyline first when selecting the intersection. Don't just snap to the intersection, because you can't be sure which elevation it will use.

Hope that works for you.

***Edit, I altered the spreadsheet to be more understandable***

[MHultgren]

Another method would be to actually insert a point at elevation along the 3D Poly using create point - Slope/Grade by elevation and pick both endpoints of the Poly to get the slope, then type in the elevation you want. add as many as you need and when you get done, erase the points from the drawing and database.

[sbullinger]

Thanks you both were a great help.

[Ammon]

Another method would be to actually insert a point at elevation along the 3D Poly using create point - Slope/Grade by elevation and pick both endpoints of the Poly to get the slope, then type in the elevation you want. add as many as you need and when you get done, erase the points from the drawing and database.

I hadn't thought of that one. That's a lot easier.