grading- what is this thing

[Joe-Bouza]

I have graded to existing in cut 2:1, then to create a berm I added another grading relative to extend an additional 2 ft and a qprofile looks good, but when I try to grad e the other side of the berm the software hangs up. I am attributing this ( and this is congecture) to this one area of the relative grading where the ray has a hook in it. the profile through it looks fine wrong- what up wiith the ray?

[Anonymous]

Is what we are seeing a surface created from a grading object or is it a "composited" surface from different sources?

[Joe-Bouza]

The cyan line is a surface from the grading

[Joe-Bouza]

Interesting upon exploding the grading the resulting 3dpline has numerous overlaping verts where ther is no companion vert  on the parent FL?

Ok, I cleaned up the exploded FL and the rest of the grading operation went according to hoyle. The question now - how do I keep the initial Daylight line from getting the extra verts? Ive tried a few settings like weeding - I even took out all intermediate elevation points? The squiggle shown occurs in the middle of a segment with a constant slope. I'll look at the existing TIN for an anomoly

[Neilw_05]

My guess is the grading cleanup algorythm is the culprit. In any case I can't think of a way to prevent the overlap as we have no control over what the software does.

A workaround might be to use a corridor for at least the daylight featureline if not the entire berm.

[Joe-Bouza · Accepted solution]

Well I believe I discovered the culprit!

My OG surface was built from GIS contour data and I based my gradin on it. Later I recieved field data to suppliment the Surface for EG. The surveyors points has several redundant  locations with 5 or 6 and in some places more points with varying elevation (not exacty the same xy or z so consequently there are sevearal TIN line going to these points and they just so happen across my daylight line causing the squiggle when I extend across. I asked why and he said they come back to certain points for calculations - I will ask for them to no longer be included with the survey

[Neilw_05]

Great sluething Joe. The surveyors should have tools to merge those redundant check shots into a single point. You might mention it in case they aren't aware of that.

[troma]

Or they should be coded so that they don't get pulled into the TIN

[Joe-Bouza]

I guess thats my fault. we don't have a surveying department and I allowed myself to be beholding to what these guys deliver. Someday I'll get it together and have some standards

[Joe-Bouza]

Yep. - see my response to Neil

[Neilw_05]

I would say that the surveyors need to improve their QA/QC. That surface model should not have gone out like that.

You can't be expected to be responsible for specs for that type of issue in your standards.

[bozorgzadeh.layla]

Sir, 

I apologize for asking my question here, but HOW did you create 2 grades?

I had a polyline I created a feature line from and picked it as my feature and with exisiting ground, cut/fill slopes (5:1) and target elevation(83'), I graded my surface. Now, I need to grade again to a lower elevation (80') with different cut/fill slopes (3:1). Since there is no feature line for me to pick what should I do? 

Thank you