https://github.com/jftuga/geodist

Golang package to compute the distance between two geographic latitude, longitude coordinates
https://github.com/jftuga/geodist

distance geolocation go golang haversine vincenty

Last synced: 20 days ago
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Golang package to compute the distance between two geographic latitude, longitude coordinates

• Host: GitHub
• URL: https://github.com/jftuga/geodist
• Owner: jftuga
• License: mit
• Created: 2021-09-16T12:51:09.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-01-09T16:17:16.000Z (12 months ago)
• Last Synced: 2024-06-18T18:34:23.128Z (6 months ago)
• Topics: distance, geolocation, go, golang, haversine, vincenty
• Language: Go
• Homepage:
• Size: 8.79 KB
• Stars: 169
• Watchers: 7
• Forks: 16
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# 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](https://www.dictionary.com/browse/ellipticity) when performing the calculation, but takes a longer time to compute.

* [Wikipedia: Haversine](https://en.wikipedia.org/wiki/Haversine_formula)

* [Wikipedia: Vincenty](https://en.wikipedia.org/wiki/Vincenty%27s_formulae)

* [Is the Haversine Formula or the Vincenty's Formula better for calculating distance?](https://stackoverflow.com/q/38248046/452281)

## Example

* [example.go](example/example.go)

```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](https://www.nhc.noaa.gov/gccalc.shtml)

* **Haversine**: [Moveable Type: Calculate distance, bearing and more between Latitude/Longitude points](https://www.movable-type.co.uk/scripts/latlong.html)

* **Vincenty**: [CQSRG: WGS-84 World Geodetic System Distance Calculator](https://www.cqsrg.org/tools/GCDistance/)

## Acknowledgements

* [Haversine Algorithm](https://gist.github.com/cdipaolo/d3f8db3848278b49db68) in `GoLang`

* [Vincenty Algorithm](https://web.archive.org/web/20181109001358/http://www.5thandpenn.com/GeoMaps/GMapsExamples/distanceComplete2.html) in `JavaScript`