Data.Geo.Jord.Ellipsoid

Types and functions for working with ellipsoids (including spheres).

see Data.Geo.Jord.Ellipsoids for supported ellipsoids.

Documentation

data Ellipsoid

Parameters of an ellispoid describing the surface of a celestial body. An ellispoid is a circle if its equatorialRadius and polarRadius are equal (both its eccentricity and flattening are 0); it is used to represent a celestial body as a sphere.

Instances

Eq Ellipsoid

Defined in Data.Geo.Jord.Ellipsoid

Methods

(==) :: Ellipsoid -> Ellipsoid -> Bool

(/=) :: Ellipsoid -> Ellipsoid -> Bool

Show Ellipsoid

Defined in Data.Geo.Jord.Ellipsoid

Methods

showsPrec :: Int -> Ellipsoid -> ShowS

show :: Ellipsoid -> String

showList :: [Ellipsoid] -> ShowS

equatorialRadius :: Ellipsoid -> Length

equatorial radius or semi-major axis (a).

polarRadius :: Ellipsoid -> Length

polar radius or semi-minor axis (b).

eccentricity :: Ellipsoid -> Double

eccentricity

flattening :: Ellipsoid -> Double

flattening

ellispoid :: Length -> Double -> Ellipsoid

ellispoid eqr invf: ellipsoid with equatorial radius eqr and inverse flattening invf.

sphere :: Length -> Ellipsoid

sphere r: ellipsoid with equatorial & polar radius radius r. The returned ellipsoid is a sphere.

toSphere :: Ellipsoid -> Ellipsoid

toSphere e: sphere from mean radius of ellipsoid e.

isSphere :: Ellipsoid -> Bool

isSphere e returns True if ellipsoid e is a sphere.

meanRadius :: Ellipsoid -> Length

meanRadius e computes the mean radius of ellipsoid e.