polyline

Go package to encode/decode polylines in "Encoded Polyline Algorithm Format"

Types

Point

type Point struct {
	Latitude  float64
	Longitude float64
}

Point is a coordinate of a point on the polyline

Methods

Encode

Encode(points []Point, precision uint32) string

Encode encodes coordinates to the "Encoded Polyline Algorithm Format"

More info: https://developers.google.com/maps/documentation/utilities/polylinealgorithm

points: points of the polyline

precision: usually 5 or 6; Google's original algorithm uses 5 digits of decimal precision, which is accurate to about a meter. A precision of 6 gives you an accuracy of about 10cm more info: https://mapzen.com/blog/polyline-precision/

Decode

Decode(polyline string, precision uint32) []Point

Decode decodes coordinates to the "Encoded Polyline Algorithm Format"

More info: https://developers.google.com/maps/documentation/utilities/polylinealgorithm

polyline: polyline string in "Encoded Polyline Algorithm Format"

precision: usually 5 or 6; Google's original algorithm uses 5 digits of decimal precision, which is accurate to about a meter. A precision of 6 gives you an accuracy of about 10cm more info: https://mapzen.com/blog/polyline-precision/

Encode5

Encode5(points []Point) string

Encode5 is a short call for Encode with precision set to 5

Accuracy is about one meter

Encode6

Encode6(points []Point) string

Encode6 is a short call for Encode with precision set to 6

Accuracy is about ten centimeters

Decode5

Decode5(polyline string) []Point

Decode5 is a short call for Decode with precision set to 5

Accuracy is about one meter

Decode6

Decode6(polyline string) []Point

Decode6 is a short call for Decode with precision set to 6

Accuracy is about ten centimeters