jftuga / geodist

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

geodist's Issues

Issue when updating deps for geodist to v1.0.0

Ran into this issue updating to v1.0.0, wondering if there is an actual security issue or if I'm doing something wrong here?

$ go get -u ./...
go: downloading github.com/jftuga/geodist v1.0.0
go: github.com/jftuga/[email protected]: verifying module: checksum mismatch
	downloaded: h1:WzDVdHJGyCF2lDIbTLCUJxchlvnBEQyORSB2AN9/Mns=
	sum.golang.org: h1:PFPQlZtj10u8ETAYTyxE0DWMl1bwA+Xzrqb4+oLkkC0=

SECURITY ERROR
This download does NOT match the one reported by the checksum server.
The bits may have been replaced on the origin server, or an attacker may
have intercepted the download attempt.

For more information, see 'go help module-auth'.

$ grep geodist go.mod 
	github.com/jftuga/geodist v0.0.0-20220120033518-3d2621e37888

$ grep geodist go.sum 
github.com/jftuga/geodist v0.0.0-20220120033518-3d2621e37888 h1:B4yAwPXab353ZlotBMPRbS2/vIuUV/tJLls2+APe/xw=
github.com/jftuga/geodist v0.0.0-20220120033518-3d2621e37888/go.mod h1:BohEDxpZ8S5ADAxW/9EKPSKWOVl0+3wHENIT40m4UO4=

On go 1.21.6

Add tags

Hey, could you please add a semver tag like v1.0.0 and a release to this repo?