Real draping of building footprints

[martin.folber]

Hi all,

maybe I am not smart and experienced enough, but please is anybody help me how to drape bulding footprints from SHP/SDF on hilly terrain? It doesnt work correctly, because when building is long rectangle, it takes elevation from the center and half of the building is underground. Why is not each vertex of polygons draped individually? All the information about elevation are there in surface. I try to convert footprints to 3D polylines, but still I am not able to import them using AutoCAD 3D DWG/Civil 3D DWG, using cloud services, it always ends with some errors. 3D SHP file also doesnt work...

Maybe just to rotate polygon building in 3D...also without success. This should be basic feature, in Civil 3D it is question of several seconds...

Thanks

Martin

[elliott.rosenfeld]

Hi Martin,

Here are a few thoughts:

 -Have you tried to sketch a coverage and shape terrain for the desired footprint locations before importing the footprints? see this topic about flattening an area: http://help.autodesk.com/view/ICD/2014/ENU/?guid=GUID-E1F525F1-B856-49AE-8399-B5A595235B02

 -Have you configured your terrain data under Configure > Source > Draping Options to "Don't Drape"? 

 -Have you specified appropriate coordinate systems for terrain and building data?

 -Also, have you tried using "Interactive Placing" to position the buildings manually? See the "Advanced tips" section of this help topic in Autodesk's  Online Help for more information on interactive placing. http://help.autodesk.com/view/ICD/2014/ENU/?guid=GUID-3626ABC8-4E3D-4ECA-B583-EC5C2ADDFD75 

Not certain this will fit your needs, but hope it helps!

[martin.folber]

Hi e.rosie,

thanks for you tips.´I have already read them all. The problem was in terrain model. Unfortunatelly it was to generic and simplified, that I had to refine it more.

Thanks anyway 🙂

Martin

[k.lew]

Martin, we're having the same issue you are. Can you elaborate more on your solution? Did you have to rebuild the terrain with more points in Civil?

[martin.folber]

Hi k.lew,

finally I had to do some surface edits under buildings directly in Civil 3D. Then it was OK.

regards

Martin

[k.lew]

Elliott/Autodesk:

Have there been any improvements here? I've got a large hilly model, and all my buildings are sinking. My terrain is pretty detailed, and it would be a LOT of work to do work in civil for every building or to interactively place every building. Obviously, I can't flatten the area because I want it to be hilly.

[kmmc55]

Newbie here.  I have a similar issue.

I have used Model Builder in IW360 2017 to create a 3D Terrain Model with 3D buildings and Bing Maps imagery.  

I have updated the terrain model by importing and overwriting part of the Model Builder terrain with more accurate GPS/Lidar points.  

The Bing Map imagery updated the drape over the new height levels, but the 3D buildings did not.  Some building are sunk below the updated ground level and other buildings are "floating" in air, still draped to the original levels.  Is there a way to import/re-define the 3D buildings to allow them to drape over the updated terrain levels?

TAI. 

[elliott.rosenfeld]

In the Data Sources panel, right click on the data source(s) for your building(s) and choose Reimport. That should hopefully do the trick.

[elliott.rosenfeld]

woops, I'm sorry I seemed to have missed this reply. I would suggest experimenting with Land Areas to grade these terrain areas under your buildings.

[JasonArtley]

I would use Land Areas like Elliot mentioned. We've discussed this previously, and Matt created a great Screencast which may be of help. Please let us know if you get it working! 

https://forums.autodesk.com/t5/infraworks-360-forum/how-do-i-avoid-fix-the-building-entering-the-ter...

[kmmc55]

Hi Elliot,

Thanks for the reply.  Unfortunately I cannot get this to work. 

The Reimport... option is grayed out (not available) on all my DATA SOURCES ... possibly because I created from Model Builder?  The LandXML file that I read in to update the ground levels also has Reimport... grayed out, even though I hold that LandXML file locally. 

On the Data Source Details it shows the Connection String as my local file for the xml file, M:/Portree-Link-Road-HRS7148/C3D/portree-extended-lidar.xml, and the Model Builder buildings, as shape files;

/tmp/modeldata_618f9a00-d72d-11e6-857c-22000bc00425_NE7DPi/buildings.shp

/tmp/modeldata_618f9a00-d72d-11e6-857c-22000bc00425_NE7DPi/buildingmultis.shp

Is there a way I can get the Reimport option available, or an alternative way to address this issue of "buried" and "floating" 3D buildings?

The attached image shows the "floating" buildings with an inset snapshot of number of buildings affected (i.e. I don't like the idea of having to tweak each building manually)

Any advice gratefully received - thanks.