github.com/bastengao/gountries

gountries

Inspired by the countries gem for ruby.

Countries (ISO-3166-1), Country Subdivisions(ISO-3166-2), Currencies (ISO 4217), Geo Coordinates(ISO-6709) as well as translations, country borders and other stuff exposed as struct data.

All data is derived from the pariz/countries repo.

This is currently a work in progress, so things may change. More stuff will be added

Installation

go get github.com/pariz/gountries

Examples

Basic

import (
  "github.com/pariz/gountries"
  "fmt"
)


query := gountries.New()

/////////////////
// Find sweden //
/////////////////

sweden, _ := query.FindCountryByName("sweden")
// sweden, _ := query.FindCountryByAlpha("SE")
// sweden, _ := query.FindCountryByAlpha("SWE")

fmt.Println(sweden.Name.Common) // Output: Sweden
fmt.Println(sweden.Name.Official) // Output: Konungariket Sverige

fmt.Println(sweden.Translations["DEU"].Common) // Output: Schweden
fmt.Println(sweden.Translations["DEU"].Official) // Output: Königreich Schweden

A bit more advanced

import (
  "github.com/pariz/gountries"
  "fmt"
)

query := gountries.New()

////////////////////////////////////////////
// Find the bordering countries of Sweden //
////////////////////////////////////////////

sweden, _ := query.FindCountryByAlpha("SWE") // "SE" also works..

// Get the bordering countries of sweden
for _, country := range sweden.BorderingCountries() {
	fmt.Println(country.Name.Common)
}

// Output:
// Finland
// Norway

////////////////////////////////////
// Find all subdivisons for Sweden //
////////////////////////////////////

subdivisions := sweden.SubDivisions()

for _, subdivision := range subdivisions {
	fmt.Println(subdivision.Name)
}

// Output:
// Västerbottens län
// Uppsala län
// Södermanlands län
// Gotlands län
// Dalarnas län
// ...

//////////////////////////////////////////////////////////
// Find all countries bordering Germany and Switzerland //
//////////////////////////////////////////////////////////

countryQuery := Country{
	Borders: []string{
		"DEU",
		"CHE",
	},
}

countries := query.FindCountries(countryQuery)

for _, c := range countries {
	fmt.Println(c.Name.Common)
}

// Output:
// Austria
// France

///////////////////////////////////////////////////////////////////
// Calculate distance between Sweden and Germany (in Kilometers) //
///////////////////////////////////////////////////////////////////

se, _ := query.FindCountryByAlpha("SWE")
de, _ := query.FindCountryByAlpha("DEU")

distance := gountries.MeasureDistanceHaversine(se, de)
//distance := MeasureDistancePythagoras(se, de)

fmt.Println(distance)

// Output:
// 1430.1937864547901

distance = gountries.CalculateHaversine(
	se.Coordinates.MaxLatitude, se.Coordinates.MaxLongitude,
	de.Coordinates.MinLatitude, de.Coordinates.MinLongitude)

fmt.Println(distance)

// Output:
// 2641.26145088825

Using packed data

The data in the data/yaml subdirectory is embedded using go-bindata. Once you include this library in your project, you won't need to access the data directory. To add or update the data, make changes to the YAML files then run:

go-bindata -pkg gountries data/yaml/*

Testing

Has a pretty solid test coverage but is constantly improving.

Todo

• Province/County querying (partially complete)
• Measurement between coordinates
• GeoJSON information
• Suggestions?