Can not control Input topography points trianglation 无法控制场地导入点自动生成的边界点

[Anonymous]

I have a regular surveyed pts as a input Toposurface. I can import a already trianglated file from microstation or C3D which can restricted these pts trianglation edges maximum length such as 5m. But when I --> Modify | Edit Surface tab, click Tools panel-->Create From Import drop-down--->(Select Import Instance). Revit will built new trianglation and insert new boundary points.

http://help.autodesk.com/view/RVT/2016/ENU/?guid=GUID-B79E6DD1-54B0-4596-80C9-2A2ADD1F58A7

• Visibility. You can control the visibility of topographic points. There are 2 topographic point subcategories: Boundary and Interior. Revit classifies points automatically.

These regular points are imported points, outsiders are Revit produced. Now I want to delete these outsiders (too many, over 5000), I can use the  Split a Toposurface  function to delete all these Revit built topography. But it's waste of time. 

Is there a function can create a toposurface only from imported data or the toposurface's trianglation edge maximum length can be defined.

我有一个场地测量文件，规则的测量点，1m一个，场地边界长弯弧形不规则，导入到revit后，revit自动添加了很多很多的外边界点，生成一个近似矩形的场地。我不想要自动生成的场地，因为外边界点都是Revit插值得到的。可以用拆分表面来删掉它生成的出了我想要范围边界的表面，但几千个一个个拆分，太多工作量了，有没有简易的方法。像Microstation或者C3D那样，可以控制生成曲面的三角形的最大边长。

[bin]

Try the Simplify Surface maybe?

[barthbradley]

You sure you didn't pick too many layers? That's what it looks like from here.  Recreate the Toposurface selecting only the layers with the relevant data. 

[Anonymous]

I tried, it will reduce interior points, not boundary points.

[Anonymous]

I only import the triangle layer. I upload a make up data, simplify the situation.  There are more curves and survey point along a "road".  For the make up case, I only want to keep the green triangle part.

The XYZ file I made up:

E          N         Z

836615.137 816138.694 0.300
836617.103 816134.097 5.000
836619.069 816129.500 0.300
836621.035 816124.903 0.083
836623.001 816120.305 0.333
836624.967 816115.708 0.050
836626.933 816111.111 0.240
836673.689 817515.833 0.333
836676.039 817520.246 0.375
836678.388 817524.660 0.833
836680.737 817529.074 0.500
836683.086 817533.488 0.800
836685.436 817537.901 0.833
836687.785 817542.315 0.417
836710.578 816187.705 0.600
836713.169 816183.429 0.000
836715.760 816179.152 0.000
836718.350 816174.876 0.333
836720.941 816170.599 0.500
836723.532 816166.322 1.500
836726.122 816162.046 0.040
836798.215 816249.600 0.095
836801.379 816245.729 0.450
836804.543 816241.857 1.167
836807.707 816237.986 0.188
836810.871 816234.114 0.160
836814.035 816230.243 0.875
836817.199 816226.371 0.067
836846.693 817389.787 0.000
836850.174 817393.376 1.429
836853.656 817396.965 0.050
836857.137 817400.554 0.133
836860.618 817404.143 0.025
836864.099 817407.732 0.094
836867.581 817411.321 0.156
836943.350 816406.933 0.333
836947.464 816404.091 0.667
836951.578 816401.249 0.800
836955.692 816398.407 0.313
836959.805 816395.565 0.875
836963.919 816392.723 0.100
836968.033 816389.881 5.000
836977.950 817220.703 0.167
836982.290 817223.185 0.143
836986.630 817225.668 1.000
836990.970 817228.150 0.167
836995.310 817230.633 0.292
836999.651 817233.116 0.438
837003.991 817235.598 0.400
837039.155 816598.347 0.889
837043.895 816596.758 0.667
837048.636 816595.168 0.042
837053.376 816593.578 0.778
837057.161 817021.847 0.000
837058.117 816591.989 0.222
837062.019 817023.029 0.000
837062.858 816590.399 0.417
837066.878 817024.210 0.300
837067.598 816588.810 0.267
837071.736 817025.391 0.350
837076.594 817026.573 0.444
837078.110 816808.824 2.500
837081.453 817027.754 5.000
837083.106 816808.611 0.250
837086.311 817028.936 0.167
837088.101 816808.399 0.067
837093.097 816808.186 1.000
837098.092 816807.974 0.333
837103.088 816807.762 1.167
837108.083 816807.549 0.700

[Anonymous]

A example case, the data as below:

E                       N                Z

836615.137 816138.694 0.300
836617.103 816134.097 5.000
836619.069 816129.500 0.300
836621.035 816124.903 0.083
836623.001 816120.305 0.333
836624.967 816115.708 0.050
836626.933 816111.111 0.240
836673.689 817515.833 0.333
836676.039 817520.246 0.375
836678.388 817524.660 0.833
836680.737 817529.074 0.500
836683.086 817533.488 0.800
836685.436 817537.901 0.833
836687.785 817542.315 0.417
836710.578 816187.705 0.600
836713.169 816183.429 0.000
836715.760 816179.152 0.000
836718.350 816174.876 0.333
836720.941 816170.599 0.500
836723.532 816166.322 1.500
836726.122 816162.046 0.040
836798.215 816249.600 0.095
836801.379 816245.729 0.450
836804.543 816241.857 1.167
836807.707 816237.986 0.188
836810.871 816234.114 0.160
836814.035 816230.243 0.875
836817.199 816226.371 0.067
836846.693 817389.787 0.000
836850.174 817393.376 1.429
836853.656 817396.965 0.050
836857.137 817400.554 0.133
836860.618 817404.143 0.025
836864.099 817407.732 0.094
836867.581 817411.321 0.156
836943.350 816406.933 0.333
836947.464 816404.091 0.667
836951.578 816401.249 0.800
836955.692 816398.407 0.313
836959.805 816395.565 0.875
836963.919 816392.723 0.100
836968.033 816389.881 5.000
836977.950 817220.703 0.167
836982.290 817223.185 0.143
836986.630 817225.668 1.000
836990.970 817228.150 0.167
836995.310 817230.633 0.292
836999.651 817233.116 0.438
837003.991 817235.598 0.400
837039.155 816598.347 0.889
837043.895 816596.758 0.667
837048.636 816595.168 0.042
837053.376 816593.578 0.778
837057.161 817021.847 0.000
837058.117 816591.989 0.222
837062.019 817023.029 0.000
837062.858 816590.399 0.417
837066.878 817024.210 0.300
837067.598 816588.810 0.267
837071.736 817025.391 0.350
837076.594 817026.573 0.444
837078.110 816808.824 2.500
837081.453 817027.754 5.000
837083.106 816808.611 0.250
837086.311 817028.936 0.167
837088.101 816808.399 0.067
837093.097 816808.186 1.000
837098.092 816807.974 0.333
837103.088 816807.762 1.167
837108.083 816807.549 0.700

The triangles I want to keep (left side, green color, imported from C3D/Microstation), while Revit triangles as right side).

[bin]

For this example, Split Surface will do the job. You can easily pick the boundary lines. Do you have boundary lines for the other one?

[Anonymous]

Thank you for your reply.

I am using Revit 2019 Chinese version. When I am using closed loop (site boundary) to split the toposurface, the error report said the boundary should can split the boundary into 2 part properly. I think maybe because the boundary may seperate the toposurface into 3 or more part.

So I used the half boundary & serval straight lines as below:

revit error report still said can not split the toposurface into 2 part properly.

And I drawed a open loop to split the surface as below which level is higher than all toposurface features. Same as the guide:  5. Sketch a single closed loop that does not touch boundaries of the surface, or sketch a single open loop. 

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2018/EN...

Revit error report said

error 1-4, the level annotation should in right reference level ????

error 5-6, can not make a triangulation survey of this toposurface, normally because a subregion is inside or overlap with the building pad, some other region may also cause this situation. ????

My translation is not that well, but actually there is no building pad in the site and I can not find why these ways did not work.

I can draw small loops to split the toposurface one by one, but the site range is over 2000m, so it would take some time. I think maybe it's the only way to solve it in this stage?? I find Revit 2020 version can link to C3D topo directly? 

https://help.autodesk.com/view/RVT/2019/ENU/?guid=GUID-3419F2BF-98F5-4988-BA51-9C23FE23D37D

[bin]

You don’t necessarily need a closed loop for Split Surface, as long as the topography is divided into two piece. For example, the second topography you uploaded, you can Tab select the whole CAD boundary and delete both end and right side boundary, without draw on the left part to close it. 

你不需要封闭的线条来Split Surface，你只需要一条或者多条连续的线条就可以, 只要保证分成两个而不是多个面。