Forums >> Revit Building >> Technical Support >> Topo Surface Edits Running EXTREMELY SLOW in 2010. Help :)

stevek77

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Joined: Mon, Nov 3, 2008
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Hello. Long time lurker, first time poster on these forums.

I'm working on an urban design/Architecture project for my Masters Thesis.  I have a site model of proposed changes to a village (1 surface...1 sub-region is the road network, another is a stream). Size of this surface was 13.2 megs. CPU is 2 GB athalon dual core processor running XP 32, 4 GB RAM, and a 512, DDR3 video card. Any edits to the site were resulting in EXTREMELY slow processing - like, 10 minutes to draw one square box pad on a site.

So I split the surface, boxing out a smaller area where I will be designing the building in this village, and erased the rest of the remaining surface. The resulting topo surface is an aprox 1500 feet by 800 rectangle....hills, a stream in the middle. The new file is 4.3 megs. Still VERY slow (5 minutes to draw a single rectangle pad). This is not to render - this is just in plan mode, with shadows and shading turned off.

It's driving me nuts . I'm halfway through thesis and this is really starting to slow down my whole project. Help!

I'm a longtime user of CAD and Sketchup, and well aware of  all the little tricks with those programs to get files smaller and to run faster.  

Are there settings I should turn down on the topo surface? Is Revit still recalling the entire old surface (in which case is there an equivalent to "purge" in CAD?) I REALLY don't care if my topo looks triangular when modeled or not - I'm not going for "Avatar" here - just trying to use Revit as a tool to express proposals for this site and getting very frustrated.

Is REvit just not cut out for site modeling like I am trying to do?

Is my computer too slow?

Any advice would be very much appreciated. Thanks.

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stevek77

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...I've tried:

turning on hidden raster elements and deleting

deleting all 3d views

purging the drawing

file is now down to 3 megs, but ANY edit to the toposurface takes 5 minutes or more.

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WWHub

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stevek77

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That's what I did - I set up the topo lines in CAD and imported.

One thing I discovered was Revit was retaining all of the subregions from the previous, larger topo map even when I split off a small peice of the surface and erased and purged the larger portion. This was only apparent after opening up said sub-region. Deleting the excess info helped a little, but it is still abominably slow to work with. The file is now 3 megs but even drawing a test square pad takes several minutes. 

My topo intervals are 10 feet, and sub-intervals are 2 feet. GRaphics display course, hidden-line, and

Are there any other settings I can turn low?  Is there a segmenting segment for curviliniar shapes I can turn to super low? I don't care if it looks like Calico-Vision, I just need to get some work done.  Again, I stress, I don't care if the site looks triangular or not. Any advice would be much appreciated. Or, should I just restart this thing in Sketchup or Rhino?

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WWHub

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STEVEK77,

As I said, do the topo work in CAD.  Use that for your plans and only use the Revit for 3D model using the imported CAD.

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