Confused!

[Thoisington]

I am familiar with the feature line elevation editor, and use it often, but something doesn't make sense to me. How can the grade ahead and grade back slopes be different than the corresponding point ahead or back.

i.e. If point #1 has a grade ahead of 2%, how can point #2 have a grade back different than 2%?

[jmayo-EE]

If I understand you correctly, you can't. They are the same run along the feature line.

Point one runs ahead to point 2 while point 2 runs backward to point 1.

[Thoisington]

I agree. How can point 1 ahead be different than point 2 back? See attachment. This isn't something I want to achieve, it's something that already happens and I don't understand it.

[wfberry]

John:

I believe I know what he is talking about.  Sta 1 Line will have the same % grade on it except one is positive and one is negative.  It is somewhat confusing but if the grade ahead is negative in the first column then that same number will be positive IF you are grading back to Sta 1.

It takes a little adjustment to understand this.

Bill

[Neilw_05]

Something is obviously wrong with your elevation editor. Each PI has identical back and ahead slopes. You might try Audit. If that doesn't help then you'll need to do some troubleshooting to find out where the problem is.

[wfberry]

In your png file think about it this way.

Your point 1 grade away to Point 2 is the first column.  Grade from Point 2 back to Point 1 is the second column on the Point 1 line.

Bill

[Jeff_M]

Neil, that is exactly how my EE looks...nothing wrong with it.

[wfberry]

Neil:

Since you replied to me.  Have you looked at a feature line editor lately?

Bill

[Neilw_05]

Woops 

I guess you are supposed to look at it by column, not by row. My bad.

That IS confusing.

[JeffPaulsen]

My grading editor looks the same as the PNG file. It appears to me that the values in the Grade Back column should just be shifted down one row.

[Thoisington]

So I have confirmation! It IS confusing, and likely the rows should be shifted. Is this a fault of the editor then and I should just accept it and move on?

[Jeff_M]

It is what it is......whoever the programmer is who wrote this tool thought this was a suitable format. But it really should be more like the Profile Editor which would make it less confusing.