"A hash function is any algorithm that maps data of arbitrary length to data of a fixed length. The values returned by a hash function are called hash values, hash codes, hash sums, checksums or simply hashes."

The data is "fixed length", 3 64bit floats. The result is an "arbitrary length" string.
What we have here is the exact opposite of a hash.

That aside, perhaps this should be called "toString", "coordsString", "chunkLocationString", or something.