There wasn't a good reason for this limitation and new versions of
netconvert support other color encodings as well:
https://github.com/eclipse/sumo/issues/8365

Am Di., 16. März 2021 um 15:40 Uhr schrieb Alejandro Rodríguez Sánchez <
[email protected]>:

> Hello again, I just solved this. The problem seems to be that -I don't
> know why-  netconvert does not accept 32-bit colored tiff files, it has to
> be 16-bit.
>
> Regards,
> Alejandro.
>
> El mar, 16 mar 2021 a las 9:54, Alejandro Rodríguez Sánchez (<
> [email protected]>) escribió:
>
>> Hello,
>> I'm running a series of simulations for different urban areas. When I do
>> it for a small area that requires only 1 DEM file from de NASA ASTER
>> collection, it works perfectly.
>> However, when my area is bigger than the ASTER DEM file, I have to merge
>> those files, but when doing that, SUMO doesn't read the .tif file
>> correctly. In fact I have the following error message:
>>
>> Error: Unknown data type in Madrid_elevation.tif
>>
>> where Madrid_elevation.tif has been created with the merge tool of the
>> raster package in R from 9 DEM files. This is the full R code:
>> library(raster)
>> h1=raster("ASTGTMV003_N39W003_dem.tif")
>> h2=raster("ASTGTMV003_N39W004_dem.tif")
>> h3=raster("ASTGTMV003_N39W005_dem.tif")
>> h4=raster("ASTGTMV003_N40W003_dem.tif")
>> h5=raster("ASTGTMV003_N40W004_dem.tif")
>> h6=raster("ASTGTMV003_N40W005_dem.tif")
>> h7=raster("ASTGTMV003_N41W003_dem.tif")
>> h8=raster("ASTGTMV003_N41W004_dem.tif")
>> h9=raster("ASTGTMV003_N41W005_dem.tif")
>>
>> mmerge = merge(h1, h2, h3, h4, h5, h6, h7, h8, h9)
>> tmp <- "D:/ALEJANDRO-TESIS/3_sumo/Topografia/Para_unir/Madrid/"
>> plot(mmerge)
>> rf <- writeRaster(mmerge, filename=file.path(tmp,
>> "Madrid_elevation.tif"), format="GTiff", overwrite=TRUE)
>>
>>
>> The only difference between the original DEM files and the merged one is
>> that originals are 16bit and the merged one are 32bit colors. And there is
>> no problem reading the merged file with any GIS software or image visor.
>>
>> Any clue of what it is wrong?
>>
>> Best regards,
>> Alejandro
>>
>> --
>> Alejandro Rodríguez Sánchez
>> PhD student
>> CIEMAT // Universidad Complutense de Madrid
>> 28040 Madrid
>> email: [email protected]
>> Website: https://alexrsanchez.github.io/en/
>>
>
>
> --
> Alejandro Rodríguez Sánchez
> PhD student
> CIEMAT // Universidad Complutense de Madrid
> 28040 Madrid
> email: [email protected]
> Website: https://alexrsanchez.github.io/en/
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