maths

package

v0.3.1 Latest Latest Go to latest Published: Jan 4, 2017 License: MIT Imports: 2 Imported by: 0

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Repository

github.com/terranodo/tegola

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Documentation ¶

Overview ¶

Package math contins generic math functions that we need for doing transforms. this package will augment the go math library.

Index ¶

Constants
func AreaOfPolygon(p tegola.Polygon) (area float64)
func DegToRad(deg float64) float64
func RadToDeg(rad float64) float64

Constants ¶

View Source

const (
	WebMercator = tegola.WebMercator
	WGS84       = tegola.WGS84
	Deg2Rad     = math.Pi / 180
	Rad2Deg     = 180 / math.Pi
	PiDiv2      = math.Pi / 2.0
	PiDiv4      = math.Pi / 4.0
)

Variables ¶

This section is empty.

Functions ¶

func AreaOfPolygon ¶

func AreaOfPolygon(p tegola.Polygon) (area float64)

AreaOfPolygon will calculate the Area of a polygon using the surveyor's formula (https://en.wikipedia.org/wiki/Shoelace_formula)

func DegToRad ¶

func DegToRad(deg float64) float64

func RadToDeg ¶

func RadToDeg(rad float64) float64

Types ¶

This section is empty.

Source Files ¶

View all Source files

maths.go

Directories ¶

Path	Synopsis
webmercator Package webmercator does the translation to and from WebMercator and WGS84 Gotten from: http://wiki.openstreetmap.org/wiki/Mercator#C.23	Package webmercator does the translation to and from WebMercator and WGS84 Gotten from: http://wiki.openstreetmap.org/wiki/Mercator#C.23

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