Error in Coordinates And Chainage

[Amriya_Exe]

In my Civil 3d File Ch. 333.600 to 334.900
point no 99502 to 99562 is intersection point of White girder edge Line with alignment on DN line.

point no 99563 to 99623 is intersection point of White girder edge Line with alignment on UP line.

I marked this point using Below methos by selecting Alignment offset 0.00 Select object (white line) offset 0.00.

intersection point is marked on Alignment but by visibility its falling outside (Horizontally Shifted on white line) In Alignment report its coming 0.00 offset.

I extracted Coordinates of this points via point Report and marked in Autocad 2d File (Attached 2nd file here)

Its going Out side.

After that I import coordinates on Alignment using point import tool and got chainages via station/offset report and imported those chainages on by DN line alignment with 0.0 offset and took coordinates again.. now this point is exact on DN line alignment but not exact intersection point.. now its on alignment but Vertically shifted. 

Q.1. Help me to fix this problem I need to work on exact accurate coordinates and must be on alignment without any error by report & by visibility.

Q.2. How to get Coordinates and Chainages at once without importing exporting 2-3 time?

Q.3. How to mark All intersection points object/Alignment at once?

[Amriya_Exe]

where is experts? 

[Kyle-L]

I think I can explain what you are experiencing. Civil 3D (like AutoCAD) does not draw spirals as smooth curves, it has to draw the spiral as a sequence of straight lines. This is generally a computer limitation where curved objects have to be drawing as lots of small straight lines. Civil 3D seems to limit the number of straight lines it uses to draw spirals, but it does not limit arcs. You will notice that, if you zoom into an arc and then REGEN, the arc will become smooth again. Civil 3D calculates the number of lines to use to represent an arc based on your zoom factor, but this does not seem to be the case for spirals.

You can see in the gif below that I have a normal AutoCAD spiral, which I then drew a line from an intersecting point, and when zooming in the line does not end at the intersecting point. Also notice in the gif that the spiral is not smooth but looks like multiple joined lines.

What this means is the point of intersection coordinate is accurate, but the display is inaccurate. I know you want the display to be perfect, but it is a limitation and you will not get it to display perfectly. Besides, if you measure the visual distance between the point and the intersection, the distance is less than 1mm. Therefore, when printing this drawing at any usable scale, you will never see the gap between the point and the intersection, so I would not worry about it. As long as you snap correctly, or use the intersection point tools, then your coordinates will be accurate.

As for your third question, I do not know of an automated way to create all the intersecting points at once.

[Amriya_Exe]

Thank you for answer. 
What you have explained I understood that I was expecting something another idea like remove elevations from alignment to make its all same ground.. 

Any idea about Q.2. How to get Coordinates and Chainages at once without importing exporting 2-3 time?

[Kyle-L]

I am not sure I fully understand Q2. I assume you want the coordinate of the COGO point as well as the chainage?

You already have the coordinate, so all you need is the chainage. Unfortunately, C3D does not have a nice easy built in way to do it, below is a couple of ways (that you have not mentioned previously) that could be helpful:

1. If you have access to the ProjectExplorer plugin then you can use the "compare to" tool to list the chainages of points relative to a specific alignment.
2. Use a third party (usually paid) plugin that can create and populate "User-Defined Property Classifications", which will attach the chainage to the points. This allows you to use the chainage in tables, labels, etc.
3. Use structures instead of COGO points. Structures contain a reference alignment property, which is used to associate a structure with an alignment and then you can use the chainage is tables, labels, etc.

Hope this helps.