Copyright	(c) 2020 Cedric Liegeois
License	BSD3
Maintainer	Cedric Liegeois <ofmooseandmen@yahoo.fr>
Stability	experimental
Portability	portable
Safe Haskell	Safe
Language	Haskell2010

Data.Geo.Jord.Ellipsoid

Description

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

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

Synopsis

data Ellipsoid
equatorialRadius :: Ellipsoid -> Length
polarRadius :: Ellipsoid -> Length
eccentricity :: Ellipsoid -> Double
flattening :: Ellipsoid -> Double
ellispoid :: Length -> Double -> Ellipsoid
sphere :: Length -> Ellipsoid
toSphere :: Ellipsoid -> Ellipsoid
isSphere :: Ellipsoid -> Bool
meanRadius :: Ellipsoid -> Length

Documentation

data Ellipsoid Source #

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 Source #
Instance details Defined in Data.Geo.Jord.Ellipsoid Methods (==) :: Ellipsoid -> Ellipsoid -> Bool # (/=) :: Ellipsoid -> Ellipsoid -> Bool #
Show Ellipsoid Source #
Instance details Defined in Data.Geo.Jord.Ellipsoid Methods showsPrec :: Int -> Ellipsoid -> ShowS # show :: Ellipsoid -> String # showList :: [Ellipsoid] -> ShowS #

equatorialRadius :: Ellipsoid -> Length Source #

equatorial radius or semi-major axis (a).

polarRadius :: Ellipsoid -> Length Source #

polar radius or semi-minor axis (b).

eccentricity :: Ellipsoid -> Double Source #

eccentricity

flattening :: Ellipsoid -> Double Source #

flattening

ellispoid :: Length -> Double -> Ellipsoid Source #

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

sphere :: Length -> Ellipsoid Source #

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

toSphere :: Ellipsoid -> Ellipsoid Source #

toSphere e: sphere from mean radius of ellipsoid e.

isSphere :: Ellipsoid -> Bool Source #

isSphere e returns True if ellipsoid e is a sphere.

meanRadius :: Ellipsoid -> Length Source #

meanRadius e computes the mean radius of ellipsoid e.