decode back to lat-lon from SH

[miquel-espinosa]

Hi,
I wanted to ask if it is possible to go back to the original lonlat once these have been embedded.
For example:

sh = SphericalHarmonics(legendre_polys=20)
embedded_lonlat = sh(lonlat) 

And now being able to retrieve lonlat from embedded_lonlat

original_lonlat = reverse_sh(embedded_lonlat) # Is this possible?

Thanks in advance,