Three Words to Coordinates

CLI tool that converts what3words addresses to latitude/longitude coordinates and vice versa.

Installation

./build.sh

Or manually:

cargo build --release

The compiled binary will be at: target/release/3W2Coords

Usage

# Single what3words to coordinates
./3W2Coords prices.slippery.traps

# Coordinates to what3words (reverse lookup)
./3W2Coords "48.858358,2.294473" --reverse

# File with multiple locations
./3W2Coords test.txt

# Specify output file
./3W2Coords test.txt output.txt

# Output format options
./3W2Coords prices.slippery.traps -f text   # default: words,lat,lng
./3W2Coords prices.slippery.traps -f csv    # comma-separated
./3W2Coords prices.slippery.traps -f json   # JSON array

Options

-f, --format <FORMAT>  Output format: text, csv, json [default: text]
-r, --reverse       Coordinate to 3 words (reverse lookup)
-h, --help         Print help
-V, --version      Print version

Output Format

text/csv (default):

words,lat,lng
prices.slippery.traps,48.858358,2.294473

json:

[{"lat":48.858358,"lng":2.294473,"words":"prices.slippery.traps"}]

API

Uses the free what3words API:

• Forward: https://mapapi.what3words.com/api/convert-to-coordinates
• Reverse: https://mapapi.what3words.com/api/convert-to-3wa

No API key required.