wgs84

package

v0.0.0-...-64661d1 Latest Latest Go to latest Published: Jun 4, 2024 License: MIT Imports: 3 Imported by: 1

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Package wgs84 is for distance, bearing, and locality calculations on the WGS84 ellipsoid.

This section is empty.

This section is empty.

func Compass(bearing float64) string

Compass converts bearing (0-360) to a compass bearing name e.g., south-east.

func CompassShort(bearing float64) string

CompassShort converts bearing (0-360) to a short compass bearing name e.g., N.

func DistanceBearing(lat1, lon1, lat2, lon2 float64) (distance, bearing float64, err error)

DistanceBearing calculates the distance in km and the bearing in degrees from lat1 lon1 to lat2 lon2 on the WGS84 ellipsoid.

type ByDistance []Locality

func (a ByDistance) Len() int

func (a ByDistance) Less(i, j int) bool

func (a ByDistance) Swap(i, j int)

type Locality struct {
	Name                string
	Longitude, Latitude float64
	Distance            float64
	Bearing             float64
}

func ClosestNZ(latitude, longitude float64) (Locality, error)

ClosestNZ returns the closest New Zealand locality to the input point. Locality.Bearing is from the Locality to the input point.

func LocalitiesNZ(latitude, longitude float64) ([]Locality, error)

LocalitiesNZ returns New Zealand localities for the input point. Locality.Bearing is from the Locality to the input point.

func (l Locality) Description() string

func (l Locality) DescriptionShort() string