jftuga/geodist

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175
Rank 218,059 (Top 5 %)
Language
Go
License
MIT License
Created over 3 years ago
Updated 11 months ago

jftuga/geodist

jftuga

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Golang package to compute the distance between two geographic latitude, longitude coordinates

geodist

GoLang package to compute the distance between two geographic latitude, longitude coordinates

Algorithm Comparison

Vincenty is more accurate than Haversine because is considers the Earth's ellipticity when performing the calculation, but takes a longer time to compute.
Wikipedia: Haversine
Wikipedia: Vincenty
Is the Haversine Formula or the Vincenty's Formula better for calculating distance?

Example

example.go

	var newYork = geodist.Coord{Lat: 40.7128, Lon: 74.0060}
	var sanDiego = geodist.Coord{Lat: 32.7157, Lon: 117.1611}
	miles, km, ok := geodist.VincentyDistance(newYork, sanDiego)
	if !ok {
		fmt.Println("Unable to compute Vincenty Distance.")
		return
	}
	fmt.Printf(" [Vincenty] New York to San Diego: %.3f m, %.3f km\n", miles, km)

	var elPaso = geodist.Coord{Lat: 31.7619, Lon: 106.4850}
	var stLouis = geodist.Coord{Lat: 38.6270, Lon: 90.1994}
	miles, km = geodist.HaversineDistance(elPaso, stLouis)
	fmt.Printf("[Haversine] El Paso to St. Louis:  %.3f m, %.3f km\n", miles, km)

Online Calculators

Great Circle: NOAA: Latitude/Longitude Distance Calculator
Haversine: Moveable Type: Calculate distance, bearing and more between Latitude/Longitude points
Vincenty: CQSRG: WGS-84 World Geodetic System Distance Calculator

Acknowledgements

Haversine Algorithm in GoLang
Vincenty Algorithm in JavaScript

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