rust geocoding library

turn coordinates into context

Fast offline reverse geocoding with enriched location data. Sub-microsecond lookups for timezone, currency, region, postal code, and 14 other fields.

input

→

output

New York, United States

America/New_York • USD • NY

<1µs lookup

18 fields

0 config

why genom

built for developers who need speed and precision

⚡

Two-level spatial grid + zero-copy parse of an embedded ~37 MB binary blob. Varint+zigzag deltas and string interning keep the footprint small.

🎯

18 fields per location including timezone, currency, postal code, region, continent, EU membership, and DST status. Everything you need in one call.

🔧

Database builds automatically on first install. No downloads, no configuration files, no external dependencies. Just add and use.

🧵

Global singleton with lazy initialization. Lock-free reads mean zero contention in multi-threaded applications. Safe by default.

Add genom to your Cargo.toml and start converting coordinates to location data immediately.

Add dependency

Import library

Start looking up

Cargo.toml

[dependencies]
genom = "2.0"

main.rs

use genom;

let place = genom::lookup(40.7128, -74.0060)?;
println!("{}", place.timezone);

every field you need, returned in microseconds

city region region_code district postal_code

country_code country_name continent_code continent_name is_eu

timezone timezone_abbr utc_offset dst_active currency

latitude longitude