2020- some of the site model contours do not display

[JXGR]

I am working on a site model in 2020. The model was generated by using 3D polylines. Once the model was done, I found there two 17' contours were not visible. I have checked classes, layers, site model's max elevations and min elevations,... etc. no lucky. In the 3D mode, I checked the elevation inside those two areas, it gave me Z:17', which means the model is correct, but just missing two contours in 2D display. 

 

I attached the site model 2D display screenshot, where the two 17' contours are missing. And a Polyline TOPO screenshot shows the location of the two contours. 

 

Site Model-troubleshooting.vwx

[Jeff Prince]

I did not find anything wrong with your model, I think this is simply a result of how Vectorworks interprets the data.  When you represent steep slops and flats with contours, these things happen.  The easy way to fix that is to hit the ol "recreate from source data" button in the OIP and throw down some stakes at 17'1" inside the two 3D polys where your contours are not showing.  Configure them so they have no 2D appearance/reporting.  This will force Vectorworks to reconsider its solution to your data and force the contour to show without significantly impacting your model.  Start with a few and see if you get your desired result.  Repeat the process until you get where you want to be, see attached images for an idea of where I arrived after a few stake placing operations.

 

I would be more concerned with the depiction of the bottom side of the model where your contours abruptly end.  Adding a few stakes there or faking those contour lines to close might get you a better depiction in that area as well.

 

 

 

Edited March 11, 2022 by jeff prince

[JXGR]

Thanks Jeff, the existing surface looks better now. 

 

I added some site modifiers to this existing surface model for a cut and fil calculation. Here is the new problem that I have. The proposed surface (1' interval contours from the 2D display) looks mess. 

 

The following are the process that I have been done:

 

1. An existing site model was created by converting a set of 2D contours into 3D polygons

 and set their Z value, then used "create site model from source data" generated the site model.  The existing site model was generated with no problem. As shown below:

 

2. I put 3D source data to a set of proposed 2D contour lines (polylines) by using “2D Polys to 3D source date”. I used "Create Objects from Shape" set them as site modifiers and put them on the class "Site-DTM-Modifier". The site modifiers’ layer was assigned to the site model.

Site modifiers are in red on the following image: 2D display proposed. After updating the site model, the site model “2D Display” showed several depressions between site modifiers.

 

The “3D Display” showed some of the proposed surface between two proposed contours (site modifiers) connecting to the existing surface. 

 

There are a few things that I also have checked:

1. Site modifiers (contours mode) applied to the proposed surface.

2. Grade limits applied to proposed surface.

 

With all this, I could not figure out which part went wrong. Any suggestions? A new file attached.

Thank you. 

 

Site Model-troubleshooting.vwx

[Benson Shaw]

I horsed around with this and found a few things which removed those depressions:

• Moved the eastern grade limits object to the Mods layer.  Created one conflict (overlapping pads notice) at western edge of the grade limits.
• Edited western edge to increase separation from the proposed contours.
• Sent to surface
• Closed the 17' contour via: Select the contour>Ungroup (=3d Poly)>OIP Close button>Objects from Shapes> Site Mod/Contour

All this removed most of the depressions and defeated the conflict.

Sending the Grade Limits to surface is probably the main thing that removed the depressions.

Might not be necessary to close that 17' contour.

 

HTH

-B

 

 

 

 

[JXGR]

Hi Benson, Thanks so much for looking into this. I really appreciate it. My model works!!