Where39

https://arcbtc.github.io/where39

Python Library https://github.com/dekoza/pywhere39
Nodejs library https://www.npmjs.com/package/where39
Phone app https://github.com/fusion44/where39_app/
Rust implementation https://github.com/sgeisler/rust-where39

LNbits extension https://github.com/lnbits/where39

Use BIP39 words to locate anywhere in the world!

what3words is cool, but it's closed, and there is no guarantee they wont change their words :(

Where39 uses the BIP39 word-list, the most distributed word-list in the world

https://github.com/bitcoin/bips/blob/master/bip-0039/bip-0039-wordlists.md

Locate anywhere to extreme accuracy using only 4-5 words!

x4 words for 5 m² accuracy

x5 words for 1 ft² accuracy

• "My location" will give you your current location words

• You can also click on the map to get location words

• By using the 4 word search you can find a specific location anywhere in the world

• For extra privacy the shuffle function shuffles the BIP39 wordlist. Only people you share the number with will be able to make sense of your word locations.

How it works

1st word

First we break the earth into tiles 32/64, 2048 tiles (the amount of words in the BIP32 wordlist). We allocate each tile a word, this is achieved by using the earths latitude (180 degrees) and logitude (360 degrees). Each tile is 5.625/5.625 degrees.

2nd word

This square is split into 2025 smaller tiles 45/45, which works out 0.125/0.125 degrees per tile.

3rd word

This square is split into 2025 smaller tiles 45/45, which works out 0.00277777777/0.00277777777 degrees per tile.

4th word

This square is split into 2025 smaller tiles 45/45, which works out 0.00006172839/0.00006172839 degrees per tile.

5th word

The 5th word is the tresure word, and usually not necessary. We can split this square into 400 smaller tiles 20/20, which works out 0.00000308642/0.00000308642 degrees per tile.

To use locally

Download the repo and run a little webserver pointing at the folder

In Linux, navigate to the folder and run,

python3 -m http.server 5000

Or you could just a tool like,

https://chrome.google.com/webstore/detail/web-server-for-chrome/ofhbbkphhbklhfoeikjpcbhemlocgigb?hl=en

https://www.youtube.com/watch?v=ygRtlWjQ-Js

Tip me

If you like this project and might even use or extend it, why not send some tip love! https://paywall.link/to/f4e4e