Trying to use included images

[glarfomatic]

I'm trying to use the routine on the included jpg imagery. I get the following errors before it just returns an all-black mask:

NotGeoreferencedWarning: Dataset has no geotransform, gcps, or rpcs. The identity matrix be returned. s = DatasetReader(path, driver=driver, sharing=sharing, **kwargs)

NotGeoreferencedWarning: The given matrix is equal to Affine.identity or its flipped counterpart. GDAL may ignore this matrix and save no geotransform without raising an error. This behavior is somewhat driver-specific. s = writer(path, mode, driver=driver,

Thanks for any help!

Davin