Metview's documentation is now on readthedocs!

Please go to https://metview.readthedocs.io/en/latest/

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 14 Next »

icon

This icon regrids GRIB data ...


The macro/python language equivalent is regrid().

The Regrid Editor

Data input parameters

Input data may be specified either by giving a path in the Source parameter or by giving a GRIB-based data object in the Data parameter. Note that you should specify either Source or Data, not both.

Source

Specifies the GRIB file path.

Data

Drop a MARS Retrieval or a GRIB file icon inside this icon field. In Python or Macro, supply a Fieldset object.

Output Grid definition parameters

Grid Definition Mode

Select a method for specifying the output grid.

  • Grid: supply a valid string or list of numbers in the Grid parameter
  • Template: supply a template GRIB file, whose grid structure will be used to generate the output GRIB; use either Template Source or Template Data to specify the template
  • Lambert Conformal: supply details of the output grid in the set of Lambert grid definition parameters
  • Lambert Azimuthal Equal Area:  supply details of the output grid in the set of Lambert grid definition parameters

Template Source

If Grid Definition Mode is set to Template, supply the path to a template GRIB file; the output GRIB will use the same grid as the template.

Template Data

If Grid Definition Mode is set to Template, supply a GRIB-based data object in the Data parameter; the output GRIB will use the same grid as the template.

Grid

Supply a grid definition as described here: grid - keyword in MARS/Dissemination request.

Examples of valid grid definitions:

GUIPython / MacroResult
1/1[1, 1]A regular lat/lon grid with 1x1 degree point spacing
0.25/0.25[0.25, 0.25]A regular lat/lon grid with 0.25x0.25 degree point spacing
O1280"O1280"An octahedral reduced Gaussian grid, octahedral with 1280 latitude lines between the pole and equator
N640"N640"An 'original' reduced Gaussian grid, with 640 latitude lines between the pole and equator
F400"F400"A regular Gaussian grid, with 400 latitude lines between the pole and equator

Area

Specifies a geographical area over which to carry out the interpolation, the default being for the whole globe. Enter coordinates (lat/lon) of an area separated by a "/" (North/West/South/East), or in Macro or Python provide a list, e.g. [north, west, south, east]; alternatively, use the assist button to define the area graphically. 

Rotation

Output Lambert grid definition parameters

These parameters are available if Grid Definition Mode is set to Lambert Conformal or Lambert Azimuthal Equal Area. The names follow the naming convention in the descriptions of these projections here:

First Point

Dx In Metres

Dy In Metres

Lad In Degrees

Lov In Degrees

Standard Parallel In Degrees

Central Longitude In Degrees

Latin 1 In Degrees

Latin 2 In Degrees

Ni

Nj

Gaussian Number

Spectral to grid definition parameters

Truncation

Intgrid

Extra processing parameters

Frame

Wind Processing

Nabla

Nabla Poles Missing Values

Interpolation methods and parameters

Interpolation

Nearest Method

Distance Weighting

Nclosest

Distance

Distance Weighting Gaussian Stddev

Distance Weighting Shepard Power

Distance Tolerance

Conservative Finite Element Method Input

Conservative Finite Element Method Output

Non Linear

Simulated Missing Value

Simulated Missing Value Epsilon

Land-sea mask parameters

Distance Weighting With Lsm

Lsm Weight Adjustment

Lsm Interpolation Input

Lsm Selection Input

Lsm Named Input

Lsm File Input

Lsm Value Threshold Input

Lsm Interpolation Output

Lsm Selection Output

Lsm Named Output

Lsm File Output

Lsm Value Threshold Output

Output GRIB parameters

Accuracy

Packing

Edition






  • No labels