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Creating topography using points file.

7 ANTWORTEN 7
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Nachricht 1 von 8
Anonymous
1478 Aufrufe, 7 Antworten

Creating topography using points file.

Hey guys,

I have been facing trouble with creating a toposurface using a points file. My .csv (excel) file is about 40MB in size, but the import process is taking ages. It hangs in-between and says that the program is not responding. 

Will the process work if I use a better system? 

I am using Revit 2018 and my current system configurations are - i7-7700HQ processor, 16GB RAM and Nvidia GTX 1060 6GB graphics. My system is pretty capable. Can someone help me out?

 

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Nachricht 2 von 8
loboarch
als Antwort auf: Anonymous

That sounds like a CRAZY huge file for a points file. Either the site is really huge, or the points in the file are really close together. I just was using a points file the other day and it was 3 MB and the site was way to big for what I was working with. I cut out the part of the site I needed to really know about and the file was 75KB. The 75KB file was about 3000 individual points which was totally big enough and with enough resolution for me to use in the model.

 

I would check to see exactly how much information you are getting in the 40MB points file and see if there is some way to get a smaller area or have it generate fewer points.



Jeff Hanson
Principal Content Experience Designer
Revit Help |
Nachricht 3 von 8
barthbradley
als Antwort auf: loboarch

....the Andes Mountain Range maybe? 

 

Naw; couldn't be. The point file is too big.  Smiley (zwinkernd) 

 

 

Nachricht 4 von 8
ToanDN
als Antwort auf: Anonymous

40 MB plain text file?  If it doesn't cover the entire Solar system and some then there is something wrong with the format.

Nachricht 5 von 8
Anonymous
als Antwort auf: loboarch

I'm pretty sure that the text file size is 37MB, I have attached a screenshot of the file properties which confirms it. We basically use Aerial LiDAR data to capture this point cloud. The site is pretty large say 1 x 1 kilometre and the point cloud comprises of 1,250,000 points at 1m distance from each other.

I need to create a topography which is extremely precise. This data has the scope of being used for analysing Mining sites other large urban scale topographical works. 

I had used a 13 MB file of an area 250x 250m in size the last time on a much slower system an it took me 4 hours to import the points and then another 45 minutes to create the topo-surface. But the surface was successfully created.

If someone is willing to help me out by trying to import the data by themselves I can upload it on the drive for you. 

If Revit is not the right software for this, can you point me towards the right software? 

I finally have to create a BIM model on the surface I have created, so I need the surface to be imported into Revit anyway.

It would be great if you could help me figure this out!

p.s I did not use contours for this purpose as the contours don't give the surface as precise as the point cloud. 

 

Nachricht 6 von 8
Anonymous
als Antwort auf: ToanDN

Really? I'm pretty sure about the file size. I even exported the LiDAR file we have as a .csv, .txt and a .xyz and all of them have a similar size.

Nachricht 7 von 8
vladimir_michl
als Antwort auf: Anonymous

LiDAR and other scanned points are not suitable for the toposurface function - they are usually too big. These "point clouds" should be pre-processed in Autodesk ReCap and then you can bring them to your BIM model with the Point Cloud function in Revit.

 

Vladimir Michl, www.cadstudio.cz  www.cadforum.cz

 

Nachricht 8 von 8
loboarch
als Antwort auf: vladimir_michl


@vladimir_michl wrote:

LiDAR and other scanned points are not suitable for the toposurface function - they are usually too big. These "point clouds" should be pre-processed in Autodesk ReCap and then you can bring them to your BIM model with the Point Cloud function in Revit.

 

Vladimir Michl, www.cadstudio.cz  www.cadforum.cz

 


Yes I think this pretty much sums it up. While technically LiDAR is probably a "points file" this is not what the topography engine in Revit is designed to consume. If you want to keep it as LiDAR data, then use recap and import a pointcloud. Or use the LiDAR file in some other Civil application where a true surface can be created and then export the surface as a points file. i think you will probably still need to limit what you are exporting so the file size is manageable.



Jeff Hanson
Principal Content Experience Designer
Revit Help |

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