projection

Documentation

Index

• Constants
• type Projection
  • func Mercator() Projection

Constants

const (
	MATH_HALF_PI    = 0.5 * math.Pi
	MATH_TWO_PI     = 2.0 * math.Pi
	MATH_QUARTER_PI = 0.25 * math.Pi
)

* Mathematical constants.

Types

type Projection

type Projection interface {
	Forward(dst []coordinates.Cartesian, src []coordinates.Geographic) error
	ForwardSingle(dst *coordinates.Cartesian, src *coordinates.Geographic) error
	Inverse(dst []coordinates.Geographic, src []coordinates.Cartesian) error
	InverseSingle(dst *coordinates.Geographic, src *coordinates.Cartesian) error
}

* Interface type representing a projection from geographic locations to points * in a plane (surface of a map) and the other way round.

func Mercator

func Mercator() Projection

* Create a Mercator projection.