fast-reverse-geocoder

A high-performance, offline reverse geocoder in JavaScript. The source of the data is Natural Earth 50m countries dataset. The key idea of algorithm is two-layers R-tree.

Installation

npm install fast-reverse-geocoder

Usage

var rg = require('fast-reverse-geocoder');

console.log(rg.search(-122.08385, 37.38605));
//{ code: 'USA', name: 'United States of America' }

API

rg.search(Longitude, Latitude)

Output:

| Attribute | type | Detail | |---|---|---| | code | string | ISO 3166-1 alpha-2 country code | | name | string | country name |

Performance

Random 100k point

country-iso                      Benchmark took 11926.951654 milliseconds
country-reverse-geocoding        Benchmark took 5683.125483 milliseconds
which-country                    Benchmark took 140.823448 milliseconds
fast-reverse-geocoder            Benchmark took 120.940622 milliseconds

Development

Run performance tests:

npm test

Generate R-tree:

npm run build