Issues with SOLWEIG v2025a Wall Surface Temperature Output

[Naeim-Mj]

Hi, I hope you are doing well.
I have been using Outdoor Thermal Comfort: SOLWEIG v2025a (the version available in the QGIS Plugin repository) to analyze wall surface temperature. Despite several attempts, I am not getting any wall surface temperature output. The model runs to completion with no errors in the log, and all the usual rasters (Kdown/Kup, Ldown/Lup, Tmrt, Shadow) are generated, but no NetCDF file containing wall temperatures is created. I would be very grateful for any pointers or advice you could provide.

[nilswallenberg]

Hi Naeim,

Try this version (install with zip in QGIS) and hopefully it works. Otherwise, reply here. :)

UMEP-processing-main-netcdf.zip

Cheers,
Nils

[Naeim-Mj]

Hi Nils, Thank you so much, I really appreciate it. That means a lot to me. If I run into any issues, I’ll let you know here. Best regards, Naeim

…

________________________________ From: nilswallenberg ***@***.***> Sent: Friday, October 24, 2025 8:44:06 AM To: UMEP-dev/UMEP-processing ***@***.***> Cc: Naeim Mijani ***@***.***>; Author ***@***.***> Subject: Re: [UMEP-dev/UMEP-processing] Issues with SOLWEIG v2025a Wall Surface Temperature Output (Issue #117) You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> [https://avatars.githubusercontent.com/u/33085509?s=20&v=4]nilswallenberg left a comment (UMEP-dev/UMEP-processing#117)<#117 (comment)> Hi Naeim, Try this version (install with zip in QGIS) and hopefully it works. Otherwise, reply here. :) UMEP-processing-main-netcdf.zip<https://github.com/user-attachments/files/23123585/UMEP-processing-main-netcdf.zip> Cheers, Nils — Reply to this email directly, view it on GitHub<#117 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BZEEOIUZH77YPHYSKDLG6VT3ZINJNAVCNFSM6AAAAACJ5DPNWWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTINBSHE2TSMBZHA>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[Naeim-Mj]

Hi Naeim,

Try this version (install with zip in QGIS) and hopefully it works. Otherwise, reply here. :)

UMEP-processing-main-netcdf.zip

Cheers, Nils

Hi,

I've been trying to run the new version, but I keep getting the same error message attached. This error did not occur before, and the model used to run without any issues; however, it did not provide the wall surface temperature.
I've checked the input data and tested different settings, but the error still persists. Just to mention, I'm using the test data you shared on GitHub.
I would appreciate it if someone could take a look and see what might be causing this issue.

Thanks,
Naeim

[nilswallenberg]

Hi,

I'm sorry for the long delay. I hope this version works:

UMEP-processing-main_netcdf.zip

Cheers,
Nils

[ML426]

Hi ,

I am encountering some issues when running the new 2025 version of SOLWEIG in QGIS.

First issue: SVF calculator with K-Means option

When running the SVF calculator, I get an error when I check the option:

"USE K-Means to calculate SVF for walls...

The error message is:

...default/python/plugins\processing_umep\preprocessor\skyviewfactor_algorithm.py", line 291, in processAlgorithm 
voxelTable, cluster_heights = svfv.svf_kmeans(dsm, dem, vegdsm, vegdsm2, wallHeights, transVeg, scale, usevegdem, pixel_resolution, voxelTable, clusters,

File "...Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\svf_for_voxels.py", line 170, in svf_kmeans
kmeans = KMeans(n_clusters=clusters, random_state=0)

NameError: name 'KMeans' is not defined

It seems that KMeans may not be imported or defined in svf_for_voxels.py.

Second issue: SOLWEIG error after disabling the K-Means option

When I uncheck the K-Means option, I am able to calculate the SVF. However, I then get another error when running SOLWEIG:

processing_umep\processor\solweig_algorithm.py", line 737, in processAlgorithm 
sr.solweig_run(outputDir + '/configsolweig.ini', feedback)

File ".../Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\Solweig_run.py", line 589, in solweig_run
dRad, Kside, steradians, voxelTable = so.Solweig_2025a_calc(

QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\Solweig_2025a_calc_forprocessing.py", line 331, in Solweig_2025a_calc
Keast, Ksouth, Kwest, Knorth, KsideI, KsideD, Kside, steradians, skyalt = ani_sky(shmat, vegshmat, vbshvegshmat, altitude, azimuth, asvf, cyl, esky,

QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\anisotropic_sky.py", line 180, in anisotropic_sky
Least_temp, Lsouth_temp, Lwest_temp, Lnorth_temp = patch_radiation.longwave_from_buildings_wallScheme(temp_sh_w, voxelTable, steradians[i], angle_of_incidence, angle_of_incidence_h,

File "C:\PROGRA~1\QGIS34~1.11\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1360, in _getitem_iterable
keyarr, indexer = self._get_listlike_indexer(key, axis)

File "C:\PROGRA~1\QGIS34~1.11\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1558, in _get_listlike_indexer
keyarr, indexer = ax._get_indexer_strict(key, axis_name)

File "C:\PROGRA~1\QGIS34~1.11\apps\Python312\Lib\site-packages\pandas\core\indexes\base.py", line 6212, in _get_indexer_strict
self._raise_if_missing(keyarr, indexer, axis_name)

File "C:\PROGRA~1\QGIS34~1.11\apps\Python312\Lib\site-packages\pandas\core\indexes\base.py", line 6264, in _raise_if_missing
raise KeyError(f"{not_found} not in index")

KeyError: '[1182.0, 1222.0, 1262.0, 1302.0, 1374.0, 1412.0, 1478.0, 1530.0, 1532.0, 1544.0, 1556.0, 1592.0, 1682.0, 1772.0, 1862.0, 1952.0, 2042.0, 2132.0, 2220.0, 2308.0, 2396.0, 2484.0, 2486.0, 2504.0, 2604.0, 2704.0, 2840.0, 2980.0, 3056.0, 3058.0, 3068.0, 3094.0, 3134.0, 3136.0, 3140.0, 3176.0, 3202.0, 3242.0, 3278.0, 3304.0, 3344.0, 3380.0, 3406.0, 3446.0, 3482.0, 3484.0, 3508.0, 3548.0, 3634.0, 3674.0, 3686.0, 3688.0, 3698.0, 3700.0, 3710.0, 3712.0, 3734.0, 3774.0, 3776.0, 3780.0, 3782.0, 3786.0, 3788.0, 3792.0, 3794.0, 3798.0, 3800.0, 3804.0, 3806.0, 3810.0, 3812.0, 3816.0, 3818.0, 3822.0, 3862.0, 3902.0, 3942.0, 3982.0, 4022.0, 4024.0, 4042.0, 4082.0, 4122.0, 4162.0, 4222.0, 4262.0, 4302.0, 4342.0, 4402.0, 4422.0, 4442.0, 4462.0, 4482.0, 4502.0, 4522.0, 4542.0, 4562.0, 4582.0, 4602.0, 4622.0, 4642.0, 4662.0, 4682.0, 4702.0, 4722.0, 4742.0, 4762.0, 4782.0, 4802.0, 4822.0, 4842.0, 4862.0, 4882.0, 4902.0, 4922.0, 4942.0, 4962.0, 4982.0, 5002.0, 5022.0, 5042.0, 5062.0, 5082.0, 5102.0, 5122.0, 5142.0, 5162.0, 5182.0, 5202.0, 5222.0, 5242.0, 5262.0, 5282.0, 5302.0, 5322.0, 5342.0, 5362.0, 5382.0, 5402.0, 5422.0, 5442.0] not in index'

Could you please let me know if this is a known issue, or if there is something specific I should check in my input data or configuration?

Thank you in advance for your help.

[nilswallenberg]

Hi,

Thank you for this. This is most likely due to recent updates of our code to comply with recent security requirements when uploading plugins to the QGIS repo.

We will look into this.

If you're running QGIS3, you could try an older version of UMEP for processing here in our repo (2-3 months back).

Cheers,
Nils

[ML426]

Hi,
I still haven’t managed to test the new version.
This time, I’m getting an error message, probably because of the POI files.
I have a question about what is expected in the wall POI file: do I only need to place the POI close to the relevant wall and specify its x and y coordinates, without indicating its z position?

Thank you for your help.

`AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\processor\solweig_algorithm.py", line 737, in processAlgorithm
sr.solweig_run(outputDir + '/configsolweig.ini', feedback)
File "C:\Users/X/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\Solweig_run.py", line 589, in solweig_run
dRad, Kside, steradians, voxelTable = so.Solweig_2025a_calc(
^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users/X/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\Solweig_2025a_calc_forprocessing.py", line 331, in Solweig_2025a_calc
Keast, Ksouth, Kwest, Knorth, KsideI, KsideD, Kside, steradians, skyalt = ani_sky(shmat, vegshmat, vbshvegshmat, altitude, azimuth, asvf, cyl, esky,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users/X/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\anisotropic_sky.py", line 180, in anisotropic_sky
Least_temp, Lsouth_temp, Lwest_temp, Lnorth_temp = patch_radiation.longwave_from_buildings_wallScheme(temp_sh_w, voxelTable, steradians[i], angle_of_incidence, angle_of_incidence_h,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users/X/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\SOLWEIGpython\patch_radiation.py", line 170, in longwave_from_buildings_wallScheme
a = dict(voxelTable.loc[l, 'LongwaveRadiation'])

File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1184, in __getitem__
return self._getitem_tuple(key)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1368, in _getitem_tuple
return self._getitem_lowerdim(tup)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1089, in _getitem_lowerdim
return getattr(section, self.name)[new_key]
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1191, in __getitem__
return self._getitem_axis(maybe_callable, axis=axis)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1420, in _getitem_axis
return self._getitem_iterable(key, axis=axis)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1360, in _getitem_iterable
keyarr, indexer = self._get_listlike_indexer(key, axis)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexing.py", line 1558, in _get_listlike_indexer
keyarr, indexer = ax._get_indexer_strict(key, axis_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexes\base.py", line 6212, in _get_indexer_strict
self._raise_if_missing(keyarr, indexer, axis_name)
File "C:\PROGRA~1\QGIS34~1.15\apps\Python312\Lib\site-packages\pandas\core\indexes\base.py", line 6264, in _raise_if_missing
raise KeyError(f"{not_found} not in index")
KeyError: '[1182.0, 1222.0, 1262.0, 1302.0, 1374.0, 1412.0, 1478.0, 1530.0, 1532.0, 1544.0, 1556.0, 1592.0, 1682.0, 1772.0, 1862.0, 1952.0, 2042.0, 2132.0, 2220.0, 2308.0, 2396.0, 2484.0, 2486.0, 2504.0, 2604.0, 2704.0, 2840.0, 2980.0, 3056.0, 3058.0, 3068.0, 3094.0, 3134.0, 3136.0, 3140.0, 3176.0, 3202.0, 3242.0, 3278.0, 3304.0, 3344.0, 3380.0, 3406.0, 3446.0, 3482.0, 3484.0, 3508.0, 3548.0, 3634.0, 3674.0, 3686.0, 3688.0, 3698.0, 3700.0, 3710.0, 3712.0, 3734.0, 3774.0, 3776.0, 3780.0, 3782.0, 3786.0, 3788.0, 3792.0, 3794.0, 3798.0, 3800.0, 3804.0, 3806.0, 3810.0, 3812.0, 3816.0, 3818.0, 3822.0, 3862.0, 3902.0, 3942.0, 3982.0, 4022.0, 4024.0, 4042.0, 4082.0, 4122.0, 4162.0, 4222.0, 4262.0, 4302.0, 4342.0, 4402.0, 4422.0, 4442.0, 4462.0, 4482.0, 4502.0, 4522.0, 4542.0, 4562.0, 4582.0, 4602.0, 4622.0, 4642.0, 4662.0, 4682.0, 4702.0, 4722.0, 4742.0, 4762.0, 4782.0, 4802.0, 4822.0, 4842.0, 4862.0, 4882.0, 4902.0, 4922.0, 4942.0, 4962.0, 4982.0, 5002.0, 5022.0, 5042.0, 5062.0, 5082.0, 5102.0, 5122.0, 5142.0, 5162.0, 5182.0, 5202.0, 5222.0, 5242.0, 5262.0, 5282.0, 5302.0, 5322.0, 5342.0, 5362.0, 5382.0, 5402.0, 5422.0, 5442.0] not in index'`