6.3.4. Reprojection

6.3.4.1. Operation


Operation name:Reprojection
Description:This Operation converts spatial data from one coordinate system to another.
Utilised in:Use Case #9 Workflow

6.3.4.2. Options


name:coordinate system
description:requested coordinate system
items:UTM, geographic, regular lat-lon, polar centred, sinusoidal, tripolar, …

name:ellipsoid
description:requested ellipsoid
items:WGS84, GRS80, Bessel, Clarke

name:reprojection method
description:method for reprojecting the data
items:nearest neighbor (primarily for thematic maps), bilinear, cubic convolution

name:propagation of uncertainties
description:analysis of propagation of uncertainties during geometric adjustment

6.3.4.3. Input data


name:longitude (lon, x)
type:floating point number
range:[-180.; +180.] respectively [0.; 360.]
dimensionality:vector
description:grid information on longitudes

name:latitude (lat, y)
type:floating point number
range:[-90.; +90.]
dimensionality:vector
description:grid information on latitudes

name:height (z)
type:floating point number
range:[-infinity; +infinity]
dimensionality:vector
description:grid information on height/depth

name:variable
type:floating point number
range:[-infinity; +infinity]
dimensionality:cube or 4D
description:values of a certain variable

6.3.4.4. Output data


name:adjusted longitude (lon’, x’)
type:floating point number
range:[-180.; +180.] respectively [0.; 360.]
dimensionality:vector
description:new grid information on longitudes

name:adjusted latitude (lat’, y’)
type:floating point number
range:[-90.; +90.]
dimensionality:vector
description:new grid information on latitudes

name:adjusted height (z’)
type:floating point number
range:[-infinity; +infinity]
dimensionality:vector
description:new grid information on height/depth

name:adjusted variable
type:floating point number
range:[-infinity; +infinity]
dimensionality:cube or 4D
description:new values of a certain variable

6.3.4.5. Parameters


name:nx
type:integer
valid values:[1; infinity]
default value:number of longitudes in dataset
description:original number of longitudes

name:ny
type:integer
valid values:[1; infinity]
default value:number of latitudes in dataset
description:original number of latitudes

name:nz
type:integer
valid values:[1; infinity]
default value:number of altitude levels in dataset
description:original number of altitude levels

name:

nx’

type:

integer

valid values:

[1; infinity]

default value:
description:

adjusted number of longitudes


name:

ny’

type:

integer

valid values:

[1; infinity]

default value:
description:

adjusted number of latitudes


name:

nz’

type:

integer

valid values:

[1; infinity]

default value:
description:

adjusted number of altitude levels


name:size of sliding window
type:integer
valid values:[1; infinity], odd numbers
default value:3
description:side length of the sliding window used for interpolation (e.g. 3x3, 9x9)

name:original coordinate system
description:definition of original coordiate system

name:adjusted coordinate system
description:definition of requested coordiate system