Site Model and Grade Limits -- Why does the grade limit affect the underlying existing data?

[twk]

I am experiencing an issue with Site Models where the underlying existing site data is being altered to meet the grade limit boundaries, when the Site Model picks up modifiers (The Grade Limit is set to affect Proposed only).

 

The Site Model is on its own design layer, the Site Modifiers are on a separate layer, and all the modifiers are set to affect the proposed site only.

The grade limit is also on the same layer as the Site Model.

 

Can anyone provide assistance to resolve this problem? Is it a known bug? Tagging the experts here 😄 @Tamsin Slatter @bgoff @Pat Stanford

 

 

 

 

[AlanW]

@twkHi I find that site modifiers affects all and any site model that sit over them. I think i made a separate design layer for separate site models or exploded one or made a snapshot.

Not sure if this is the issue you are having problem with?

I also put the site modifiers that relate the the site on the same design layer.

HTH

Edited January 25, 2023 by AlanW

[P Retondo]

What is the nature of your existing data?  3d points, 3d polys, stakes?

[twk]

21 hours ago, AlanW said:

Hi I find that site modifiers affects all and any site model that sit over them. I think i made a separate design layer for separate site models or exploded one or made a snapshot.

Thanks @AlanW, thats what I've done. 

 

 

1 hour ago, P Retondo said:

What is the nature of your existing data?  3d points, 3d polys, stakes?

They are made up of 3d loci's and 3D Polygons

 

The issue I'm having is that the grade limit is set to Apply To:Proposed Only. However when I view the Site Model in 3D Existing, its showing the Site being affected still by this grade limit.

 

 

[P Retondo]

40 minutes ago, twk said:

The issue I'm having is that the grade limit is set to Apply To:Proposed Only. However when I view the Site Model in 3D Existing, its showing the Site being affected still by this grade limit.

 

So, you are saying the underlying data is being modified by the existence of a grading limit.  Are you just inferring that from the "existing" site model results, or do you actually observe modification of the 3d loci and polygons?

[twk]

Not the underlying data within the site model. those stay the same if I go into the site model data. What I'm seeing is that when I change the Site Model "Display" either in 2D or 3D, and set the "Display" to be "Existing" it is showing the Existing contours altered

[AlanW]

@twkcheck the site modifiers you can set them to be to existing or proposed,

[E|FA]

23 hours ago, twk said:

all the modifiers are set to affect the proposed site only

 

[AlanW]

Can you send me a file private if you want.

[twk]

@AlanW all the modifiers are set to proposed. I'll see if I can send a separate file for this. Hopefully the video is clear enough to see the problem. Just wanting to see if anyone has faced the same issue?

[AlanW]

Ya sorry didnt click on it and just now saw the video

 

[AlanW]

@twkHave you tried taking the site modifiers and putting them in the same design layer as the model rather than a different design layer. i have never done that always in the same design layer

[twk]

Yep, thats the old way I would normally do things. But the Site Model has an option to select which design layers you want the site model to be affected by. Giving you the option of having multiple options of grading a site.

[AlanW]

@twk Hi yea i just set one up and cant get the side modifiers on the other design layer to affect the model on the other design layer

[twk]

Have you set the custom design layers in the settings dialog?

 

[AlanW]

@twk Yes so i changed it to set by visible layers only it works must be a Bug dare i say

Edited January 25, 2023 by AlanW

[AlanW]

@twkHi seems to work now. i didn't have the tick on the design layer for the site modifier.

Saved as 2021 cant check. will put a 2023 one down also.

2041461386_SiteModifiers.vwx 1589402315_SiteModifiersv2021.vwx

[P Retondo]

I have had similar problems when using 3d polys as the basis for a site model, where rational topography failed to convert to a model properly at the boundary of the model (not a grading limit issue, per se).  I have not experienced similar problems when using stake objects to create topography, so one possible work around might be to distribute some stake objects (or possibly 3d loci) along your contours, and see if a model generated from those objects doesn't behave more properly.

 

Site model tool definitely needs some work.  Whether VW engineers will be allowed to spend time on that seems, unfortunately, like many other tools for architects, to be an MBA level decision.