BandA Posted December 18, 2008 Share Posted December 18, 2008 (edited) I have created a site model recently, but for some reason, I can't get the cut and fill volumes to display anything but 0.000000 CU Yd. I have created several site models and have always been able to confirm these in the past. Any ideas??? Could the area of the site model be too big? 366224.041 sq ft Settings: 2D Display Proposed + Existing 2D Style 2D Contour 3D Display Proposed Only 3D Style 3D Contour Area Display Type Volume Display Type Cu Yd Edited December 18, 2008 by BandA Quote Link to comment
Bob Holtzmann Posted December 22, 2008 Share Posted December 22, 2008 Are you using VW12.0 or VW12.5? I recall that the site model works better in 12.5. And are all of the site-related objects on the same layer? I have worked on a site about that big in VW12 a few years back, and it did give me the cut/fill numbers. But the size of the site did cause slow updates. Quote Link to comment
Bob Holtzmann Posted December 23, 2008 Share Posted December 23, 2008 Oh, yeah, I also recall when I was working on the big site, I had to keep the contour polys for the site really simple, with as few vertices as possible. I think that will improve the update speed. Quote Link to comment
islandmon Posted December 24, 2008 Share Posted December 24, 2008 The algorithms are not dependent on simplifications for accuracy. A Null result is a clear indication of an error in the dataset. Quote Link to comment
Bob Holtzmann Posted December 26, 2008 Share Posted December 26, 2008 I was simply recalling my experience with the Cut/Fill command. In my experience, while using VWA 12 for a big site, the simplified polys made a difference between getting a calculation result in a dialog window, or nothing. And at the time, it appeared to me that the "nothing" result was from a script timing out, possibly because the calculation was taking too long. Quote Link to comment
islandmon Posted December 27, 2008 Share Posted December 27, 2008 The Volumes dialog usually appears at the termination of a successful Cut/Fill procedure regardless of the accuracy of the data. Larger datasets will result in longer calculation times as well as improved accuracy. Nevertheless, the DTM parameters & spacings should be minimized to provide a nominal result based on the desired incremental volumes processed by the men&equipment required for the sitework. For example, compaction is usually specified by layers & densities which have DTM calculable volumetric characteristics. Therefore, the precision of the Cut&Fill procedure should reflect the compaction factors. In my limited experience the use of a uniform topographic grid determined by the minimum incremental volume for the DTM procedures greatly improves the over all efficiency of the process. Indeed, the end result is more easily checked for errors by manually comparing Cut&Fill volumes from a few representative grid cross-sections. Quote Link to comment
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