Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

RE: Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

Inga Morozoff — Wed, 20 Sep 2017 15:34:06 GMT

Hello.

If you don't want *any of the STM data* to cross over the river, then you'll need to create separate STMs for each area bounded by the river edge. Note that you'll also need to adjust the Edge Method to Max Triangle Length as shown. The value to set is based on the data itself and will vary. To the best of my knowledge this is the only way to achieve what you describe.

Please email me directly so that I can work with you offline.

inga.morozoff@Bentley.com

Thank you!

RE: Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

SRG — Wed, 20 Sep 2017 11:13:07 GMT

Inga,

Thanks for the troubleshooting to find a workaround for the masking issue.

It worked for me as well.

But I am looking for a mask, where the contours or the triangles will not cross over the river banks.

As you see in this case,, there are lines (representing the edges of triangles) crossing the river.

Is this possible?

SRG

RE: Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

Inga Morozoff — Tue, 19 Sep 2017 20:00:56 GMT

Hello SRG,

I am able to duplicate the issue you are experiencing, but had success when I used a smaller shape for the river.

1. Copy the existing river to a new level.

2. Drop it and recreate the complex shape to it only covers the needed area.

3. Create the STM.

RE: Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

SRG — Tue, 19 Sep 2017 11:11:10 GMT

Dan,

I tried this with the attached dataset where the rivers and coastal lines have been used as mask.

But the masking does not work.

I have included the dataset (dgn and stm file as DGN-STM-SRG.zip) )for your cross-check and a solution.

SRG

communities.bentley.com/.../DGN_2D00_STM_2D00_SRG.zip

RE: Excluding features from Scalable Terrain Model (STM) during generation of STM and contours

Dan Weston — Thu, 24 Aug 2017 19:38:08 GMT

SRG, Use the Mask option to define levels in the DGN File that contain features that you don't want included in the DTM.

Masking polygons restricts the DTM to areas outside the polygons.