topic Re: Extract roof form tool from lidar data errors in Esri Tutorials Questions

Extract roof form tool from lidar data errors

Rens_Vermeltfoort — Thu, 28 Feb 2019 14:43:59 GMT

Hello,

I want to extract the roof forms of buildings using Lidar data and buildings of Amsterdam.

I followed all the steps of the Esri tutorial for extracting rooftops from Lidar data.

I created a all the elevations layers (DSM, DTM, and nDSM) following all the steps of the tasks.

After running the extract roof form I get an error

The parameters are as following:

- minimum flat roof area: 250

- minimum slope roof area: 75

- minimum roof height: 8

First, after running I got the error 000735 that said that the parameters are invalid.

After playing with the parameters and using other building data I got the error 010423.

Who can help me out?

Greetings,

Rens

Re: Extract roof form tool from lidar data errors

megan_r — Fri, 01 Mar 2019 16:49:50 GMT

Hello Rens,

The most recent error (010423) generally occurs when the statistics for the input raster have not been calculated, contain a skip factor greater than 1, or contain an ignore value. Use the calculate statistics tool to make sure that statistics have been calculated on RoofSlopeAngle.

010423: does not have valid statistics as required by the operation.—Help | ArcGIS Desktop

Calculate Statistics—Data Management toolbox | ArcGIS Desktop

After calculating statistics for the raster, are you successfully run the script? If not, are you getting the same error message?

Best,

Megan

Re: Extract roof form tool from lidar data errors

Rens_Vermeltfoort — Tue, 05 Mar 2019 12:08:03 GMT

Hello Megan,

Thank you for you answer!

I calculated the raster statistics on the DSM, DTM, and nDSM. Still the same errors occurs. Everything works until the marking feature class and the error 000735 keeps occurring. Do you have a solution for this?

Greetings Rens

Re: Extract roof form tool from lidar data errors

JenAmes — Mon, 29 Apr 2019 15:22:20 GMT

I am working my way through the "Extract Roof Forms for Municipal Government" lesson and have run the Extract Roof Form tool multiple times, always receiving the same error.
"Failed to execute. Parameters are not valid.
ERROR 000728: Field OBJECTID does not exist within table
Failed to execute (JoinField).
Completed script Extract Roof Form...
Failed to execute (ExtractRoofForm)."

I don't understand where OBJECTID doesn't exist from. It is in the building layer that I input, and all of the other layers are raster, so don't have OBJECTID fields. Where else would this tool be looking for that field? Why does it run through 30 minutes of steps to fail because supposedly OBJECTID doesn't exist?

Re: Extract roof form tool from lidar data errors

Gert_van_Maren — Mon, 13 May 2019 04:47:35 GMT

Hi Rens,

The Learn lesson is quite out of date, I believe.

The latest local government 3D basemap solution has the most up-to-date tools.

https://solutions.arcgis.com/local-government/help/local-government-scenes/get-started/

Can you try that and see if it works?

Re: Extract roof form tool from lidar data errors

Gert_van_Maren — Mon, 13 May 2019 04:47:56 GMT

Hi Jen,

The Learn lesson is quite out of date, I believe.

The latest local government 3D basemap solution has the most up-to-date tools.

https://solutions.arcgis.com/local-government/help/local-government-scenes/get-started/

Can you try that and see if it works?

Re: Extract roof form tool from lidar data errors

G__AndrewFricker — Wed, 19 Jun 2019 19:29:55 GMT

I'm also having a similar issue, I've worked my way through the local government tutorial and get a similar error message about the statistics (see message below). I went back and calculated the statistics for each of the three input rasters, but still get the message. I'm not sure how to calculate the stats for 'RoofSlopeAngle' as that's an intermediate layer that I don't calculate directly (I don't think).

Any help or guidance would be appreciated. Thanks you.

Re: Extract roof form tool from lidar data errors

DanielHedges — Wed, 19 Jun 2019 22:04:06 GMT

Hi Andrew,

This looks similar to the previous errors. Are you using the "Extract Roof Forms for Municipal Government" Learn Lesson, or the current Local Government 3D Basemap solution?

We are working on updating the Learn Lesson to be in line with the current solution, and should be updated shortly, but until then, the 3D Basemap solution is the current supported version of this workflow.

Re: Extract roof form tool from lidar data errors

JenAmes — Wed, 26 Jun 2019 19:02:45 GMT

Daniel,

I'm receiving the exact same error that G. Andrew Fricker‌ received. I was able to get it to work successfully once, but was not satisfied with the results, and therefore went through the whole process again. I am receiving the error in the Local Government 3D Basemaps solution, in the Create LOD2 Buildings first step. I followed every step through from the beginning when I decided to re-do the LOD2 buildings, so did I somehow miss a step this time through that didn't calculate statistics? Where in the Local Government 3D Basemap solution would I find the step to calculate statistics? Can I just pick up from that step, re-do it while calculating statistics, and continue forward? Or will I have to repeat the whole process again?

Re: Extract roof form tool from lidar data errors

HeatherSmith — Tue, 02 Jul 2019 20:28:51 GMT

Hi all,

I apologize that this lesson is causing you some problems. We are currently working on updating the workflow, and will post to this thread once it is released. In the meantime, you should refer to this workflow instead: Local Government 3D Basemaps. You can navigate through the lesson using the tabs on the left (Install add-in, etc.)

Re: Extract roof form tool from lidar data errors

G__AndrewFricker — Sat, 06 Jul 2019 09:39:16 GMT

Jen Ames‌ I ran back through the whole "Local Government 3D Basemap" process as well, I did skip a few of the optional steps like the 'split buildings using features' step, because I didn't have feature to use, but I got the same error again at the 'Roof Slope Angle' step. I feel like I must be missing something because I can't get it to run through once with any results. Any tips?

Re: Extract roof form tool from lidar data errors

JenAmes — Thu, 18 Jul 2019 12:44:04 GMT

Honestly, the only thing I can tell you is keep trying. My experience is that I get the tools to work sometimes, but not every time. I just kept running through it, and eventually it works. I'm fairly certain that I don't change the parameters I'm using, so I don't know why it only works sometimes. Half the time my data is floating hundreds of feet in the air and nothing I do can get it to sit on the ground. There is not nearly enough information in the Local Government 3D Basemaps solution both online and in the individual task steps to explain to me what's happening and why.

Essentially, my tip for you is that I hit "Run" and hope for the best.

Re: Extract roof form tool from lidar data errors

Gert_van_Maren — Thu, 18 Jul 2019 19:53:28 GMT

Hi Jen,

We just (2 days ago) fixed a number of bugs including the SetNull (Andrew) and Invalid field type bugs in our latest release. Could you try and see if you still have issues with your data using this release:

http://solutions.arcgis.com/local-government/help/local-government-scenes/get-started/

If issues continue, can you please share some of data so we can get to the bottom of this. To speed up your testing, just select a couple of buildings and run.

Thanks Gert

Re: Extract roof form tool from lidar data errors

JenAmes — Tue, 23 Jul 2019 18:41:20 GMT

I have two issues now with it. Extracting an elevation surface used to take at most an hour, but I have tried to do this multiple times and has taken 8+ hours each time, one of them taking 63 hours to run. I'm currently in the middle of trying to extract elevation surfaces and it has thus far taken 4 hours. It has also generated a DSM/DTM/nDSM that sits about 800 ft in the air, which is why I'm running it again, with different parameters and environments this time.

My other issue is with editing the 3D buildings once they are generated. For the buildings that I have generated, both with this version and the last version, I want to make them more realistic. My borough has many twin and row homes, and the roof forms generated often end up looking like this (in addition to no matter what I do, they will not sit on the ground):

The Roof Form Extraction Process page from the Local Government 3D Basemaps solution page describes editing the Roof Form attributes, but then doesn't explain how to turn the newly updated polygon attribute information into the multipatch feature class I'm looking for. I made changes to hundreds of buildings in the RoofForm polygon layer generated in the building creation process, but these changes don't modify the multipatch 3D buildings. The editing that can be done to a multipatch feature class is proving to be very difficult, and much more time consuming than editing the polygon attributes. This issue may be more user error than the program itself, but I am not finding any resources that describe how to make changes to, and then update the multipatch feature class that isn't manually moving vertices.

Please let me know if there's something I'm missing, but currently, though the process may generate less non-specific error messages, it's just as frustrating.

Re: Extract roof form tool from lidar data errors

Gert_van_Maren — Tue, 23 Jul 2019 21:46:16 GMT

Hi Jen,

Extracting elevation all depends on extent of the lidar and the resolution of the rasters. So what size area are you trying to process and at what resolution? We have done county wide lidar sets at 0.5m resolution and that took around 12h.

If your DEM etc are too high / low, there might be an issue with your units so potentially issues with the projection of the las files. Check you are using the correct projected coordinate system and that the las Z values are the same as the XY units.

If you want to manually edit multipatches, you need to convert the polygons with rules. This can be done through the Fuse Roof Form Segments task in the solution template or alternatively use Layer 3D to Feature Class to create multipatches from a 3D polygon layer.

Regards gert

Re: Extract roof form tool from lidar data errors

JenAmes — Wed, 24 Jul 2019 17:04:19 GMT

Gert,

The borough I work for is less than 3 square miles, with the LAS dataset being just about the same area at a resolution of 1.5 feet. I did not have this problem of taking 8+ hours before the update. I was trying to run it again with a different projected coordinate system but after it ran for 6 hours, I had to stop the process, so I will be trying again soon.

I will look into the Fuse Roof Form Segments task and the Layer 3D to Feature Class tool for my other issue. Thank you!

Re: Extract roof form tool from lidar data errors

JenAmes — Thu, 01 Aug 2019 13:10:18 GMT

I was finally able to create acceptable multipatch buildings, but I'm running into an issue with trying to create schematic trees.

ERROR 010423: C:\Users\james\Documents\ArcGIS\Packages\LocalGovernment3Dbasemaps_B9FE7822-0621-4271-8E3D-FA3C4CA7C26B\p20\Intermediate.gdb\VegSinkRaster does not have valid statistics as required by the operation.
ERROR 010423: C:\Users\james\Documents\ArcGIS\Packages\LocalGovernment3Dbasemaps_B9FE7822-0621-4271-8E3D-FA3C4CA7C26B\p20\Intermediate.gdb\VegSinkRaster does not have valid statistics as required by the operation.
Failed to execute (SetNull).

I tried to run the Calculate Statistics tool on VegSinkRaster, but I'm still receiving this message. Is there something else I can do to get this task to work?

Thank you!

Re: Extract roof form tool from lidar data errors

DanielHedges — Thu, 01 Aug 2019 18:32:07 GMT

Hi Jen, can you share the parameters that you used? I may need to see a sample of your data to reproduce if you are able to provide it.

Thanks,

Dan

Re: Extract roof form tool from lidar data errors

JenAmes — Thu, 01 Aug 2019 18:46:14 GMT

Here are my parameters. For buffer distance, and canopy heights, I just accepted the values it auto-populated.

Let me know if you want me to email you a copy of my data.

Re: Extract roof form tool from lidar data errors

DanielHedges — Thu, 01 Aug 2019 18:52:20 GMT

Thank you Jen. It looks like you are using a straight LAS file as an input. Can you try adding that to a LAS Dataset and try again? If that still doesn't work, please send a sample of your data over, dhedges at esri dot com.