Datum

Documentation

data Datum

To represent a set of parameters for describing a particular datum, including a name, the reference ellipsoid used and the seven parameters required to translate co-ordinates in this datum to the WGS84 datum.

Constructors

Datum

Fields

• name :: String

  The name of this Datum.

• ellipsoid :: Ellipsoid

  The reference ellipsoid associated with this Datum.

• dx :: Double

  Translation along the x-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• dy :: Double

  Translation along the y-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• dz :: Double

  Translation along the z-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• ds :: Double

  Scale factor for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• rx :: Double

  Rotation about the x-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• ry :: Double

  Rotation about the y-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

• rz :: Double

  Rotation about the z-axis for use in 7-parameter Helmert transformations. This value should be used to convert a co-ordinate in a given datum to the WGS84 datum.

Instances

Eq Datum

Methods

(==) :: Datum -> Datum -> Bool

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

Show Datum

Methods

showsPrec :: Int -> Datum -> ShowS

show :: Datum -> String

showList :: [Datum] -> ShowS

etrf89Datum :: Datum

Pre-determined data:

ireland1965Datum :: Datum

osgb36Datum :: Datum

wgs84Datum :: Datum

nad27GreenlandDatum :: Datum

nad27WesternUSDatum :: Datum

nad27AlaskaDatum :: Datum

nad27CentralAmericaDatum :: Datum

nad27SanSalvadorDatum :: Datum

nad27AlbertaBritishColumbiaDatum :: Datum

nad27CanadaEastDatum :: Datum

nad27ContiguousUSDatum :: Datum

nad27MexicoDatum :: Datum

nad27BahamasDatum :: Datum

nad27CanadaNWTerritoryDatum :: Datum

nad27CanadaManitobaOntarioDatum :: Datum

nad27CanadaDatum :: Datum

nad27CanadaYukonDatum :: Datum

nad27CubaDatum :: Datum

nad27AleutianWestDatum :: Datum

nad27AleutianEastDatum :: Datum

nad27CanalZoneDatum :: Datum

nad27EasternUSDatum :: Datum

nad27CaribbeanDatum :: Datum