No implementation of function Function(<built-in function heappush>) found for signature about pyflwdir HOT 5 CLOSED

I haven't yet found a working source for newer SRTM data, but I tried it with Copernicus data from https://ec.europa.eu/eurostat/web/gisco/geodata/reference-data/elevation/copernicus-dem/elevation (10_DEM_y30x-110.tif) and got the same error.

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I get the same error using NASADEM data (https://www.earthdata.nasa.gov/esds/competitive-programs/measures/nasadem).

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Maybe it's caused by DEMs that are of type Integer. I tried with a DEM in Float32 that worked, then after conversion into Int16 it failed with this error. I say maybe because as the data is altered, maybe there are also artifacts created during the conversion that cause the issue.

EDIT: just to confirm that after converting the Int16 raster into Float32, it works again (even with rounded values).

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Thanks for posting the issue and a workaround.

It seems z1 in the line below somehow (not sure why) is of a different dtype than the elevation grid causing the issue. Forced it to be the same dtype will probably solve it.

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This should be fixed in PR #41 and will be added to the next release. For now you can install the latest development version from the main branch of the github repos. Feel free to reopen in case the issue is not solved.

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