The purpose of this library is to simply read GeoTIFFs, nothing else. It should work for other TIFFs as well, I guess, but TIFFs come in many flavors, and it's not intended to cover them all. In its current state, it works for very basic GeoTIFFs, which sufficed to extract elevation data for use in the routing library. In case you want to extend the library or have suggestions for improvement, feel free to contact me, open an issue ticket or send a pull request. You might also consider the GDAL bindings for Rust. Depending on your usecase, it might be easier to use.