Can you raise/lower a feature line

[ESchomberg]

Hi there, I am drawing a topo and on part of it the field crew shot the backs of curb but did not shoot the edge of pavement. I am using feature lines and need to offset the curb 1.5 feet and lower it 0.5' to create an edge of pavement. I know how to offset I just don't know how to lower the line 0.5'.

[rl_jackson · Accepted solution]

You need to use the Stepped Offset command on ribbon in the Edit Geometry.

OFFSETFEATURE at command line

[fcernst]

Oh don’t do this.. this could ruin your career..

Send them back out..

[rl_jackson]

@fcernst 

Why do you think you would need data, at such a level that would require additional field shot data for a STANDARD curb cross section? The water flows in the gutter pan which is usually 6-8" down depending on state/city/county requirements, and at worst case reversed or has a inverted slope. I've not seen a single gutter flow calculation, that would be a make or break on a couple of hundredths or a tenth for that matter in any drainage calculations I've ever done, but I have seen engineers design sites that cant be built to the grades specified on the pavement. I call this micro-grading, everything doesn't work if the grade specified is missed by over a half inch. Even with the tools available today, it just cant be built to that level of accuracy.

[fcernst]

 The water flows in the gutter pan which is usually 6-8" down depending on state/city/county

Usually? … 

He’s suppose to be picking up existing edge of pavement condition.. probably a rehab project which he would totally f up now for the Engineer’s Mill/Overlay analysis..The engineer would catch this crude offset  laziness anyway.. or should if experienced.  

Existing EOP is rough and undulating..

Scary.. lazy.. survey practices.. not on my jobs. 

Please tell us you don’t do this..

[rl_jackson]

Existing EOP is rough and undulating..

It's still not going to make or break, any calculation, there are standards for estimating and design that even include fluff. The +/- effect. Maybe at a hundred mile, you see something but it's all built-in.

Scary.. lazy.. survey practices.. not on my jobs.

Are you physically there watching the survey field crew do the job? Is every shot from the GPS unit, on the money, and they sat on it for 10-15 minutes (I guarantee not, and GPS data is not that accurate). Was ever shot from a Total Station taken at less than 700' from a control point that is dead on the money to get the level of accuracy your requesting, and did the guy behind the instrument center the cross hairs exactly in the middle of the glass/on prism line or better yet did the robot do it correctly and was equipment calibrated correctly. There are just to many variables, and the equipment is not capable of the task your suggesting even on a good day. Then you throw in the OH!!!! I totally believe this ABSOLUTELY BS surface model that I'm going to rely on a computer generated calculation, that's it is TRUE.

EDIT: I've only seen a few things get the accuracy your requesting, there a milling machine for mechanical parts and a lathe. But we are building rocket ships to Mars.