SUEWS Prepare - ERROR MESSAGE: local variable 'zMax' referenced before assignment

[divya42581]

While running the SUEWS Prepare for Indian City, I got the attached error. Please help me how I can resolve this error.

Thanks.

[divya42581]

I changed the zMAx to zMax in line 424 in the prepare_worker.py file, the above error is resolved now but I am getting a new error as in the attached picture. Please help me how I can resolve this error.

Thanks.

[biglimp]

Thanks for noticing this typo. We will fix this.
Regarding your new error, could you share your data so that we can try to identify your error.

[divya42581]

Hey, Thank you for your previous response. I am again stuck with the same error. "CRITICAL EXCEPTION IN C:\Users/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\SUEWSPrepare\prepare_worker.py, LINE 455 "IMP_zd, IMP_z0 = rg.RoughnessCalc("Kan", zH, fai, pai, zMax, sdComb)" ERROR MESSAGE: 0.0 cannot be raised to a negative power" I’ve attached the files I'm using to generate the input files with SUEWS Prepare. Any help would be greatly appreciated. From reviewing the RoughnessCalc function (Python file also attached), I suspect the issue may stem from NaN values in "z_d_output" and "(1 - (z_d_output / zH))* fai". Could you please take a look and let me know what you think? Warm Regards Divya

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On Tue, Jan 7, 2025 at 2:51 PM biglimp ***@***.***> wrote: Thanks for noticing this typo. We will fix this. Regarding your new error, could you share your data so that we can try to identify your error. — Reply to this email directly, view it on GitHub <#695 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AMG4D446APIVSFO4ZMK5N5T2JOMCVAVCNFSM6AAAAABUP64RLOVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNZVHA4TMOA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[divya42581]

Please find the attached ZIP file. The files were included in the email. Sorry for the inconvenience.

Data_for_SUEWS_Prepare.zip

[biglimp]

There is something strange with your building morphology data. Your pai is 1.00 for all grids and that is not correct. Revisit how you calculate your build_mprph data.

[divya42581]

I was calculating building morphology using the GLAMOUR 'BH' dataset. Yes, it is giving PAI 1 for all grids, I think it might be because of NoData pixels values of -255.
I now use the DSM and DEM data with 30m resolution to calculate the Build_morph.

But, the error remains same with new data as well, 2025-05-27T12:02:20 CRITICAL EXCEPTION IN C:\Users/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\SUEWSPrepare\prepare_worker.py,
LINE 455 "IMP_zd, IMP_z0 = rg.RoughnessCalc("Kan", zH, fai, pai, zMax, sdComb)"
ERROR MESSAGE: 0.0 cannot be raised to a negative power

Please find the attached ZIP file.

Updated_Data.zip

[biglimp]

There are inconsistencies between your land cover data and your DSMs. See for example grid 3,4,5 where your land cover fractions for buildings are 1.00 which is not the case fpr pai in the building morh file. Those two should be the same. You need to revisit your GIS data and your calculations. Make sure your use the same CRS etc.

[divya42581]

The pixels of my LULC and DSM rasters don’t align. I'll check how I can address this.
Thank You.