geojson

Documentation

Index

• Constants
• Variables
• func CircleGeom(cLat, cLng, radiusM float64) string
• func Haversine(lonFrom float64, latFrom float64, lonTo float64, latTo float64) (distanceM float64)

Constants

const EarthRadiusM float64 = 6378137.0

EarthRadiusM is the approximate radius of the earth in meters

Variables

var DefaultSegments float64 = 20

DefaultSegments controls the number of segments output in the geometry created by CircleGeom.

Functions

func CircleGeom

func CircleGeom(cLat, cLng, radiusM float64) string

CircleGeom outputs a GeoJSON geometry representing a circle of radius radiusM meters centered at (cLat, cLng)

func Haversine

func Haversine(lonFrom float64, latFrom float64, lonTo float64, latTo float64) (distanceM float64)

Haversine computes the distance in meters across the world's surface between two lat/lng coordinates.