geodetics-0.0.3: src/Geodetics/Altitude.hs

module Geodetics.Altitude (
  HasAltitude (..)
) where

import Numeric.Units.Dimensional.Prelude

-- | All geographical coordinate systems need the concept of#
-- altitude above a reference point, usually associated with
-- local sea level.
-- 
-- Minimum definition: altitude, setAltitude.
class HasAltitude a where
   altitude :: a -> Length Double
   setAltitude :: Length Double -> a -> a
   -- | Set altitude to zero.
   groundPosition :: a -> a
   groundPosition = setAltitude _0