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A comprehensive and flexible package, Meteorological Interpolation and Re-griddingRegridding (MIR), is now used at ECMWF to interpolate data for presentational or other purposes.  It has three aims:

• to accept information in any grid point format (e.g. observations or satellite data),
• to convert model or other data from any grid pattern format to any other gridpattern grid pattern as desired (using an Any-to-Any algorithm).
• to present model or other data graphically on any grid pattern, including 3-D presentations, and include rotation and cropping as desired.   

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The interpolation package MIR does not use a land-sea mask when interpolating data to another resolution as the data will already have taken the land-sea mask into account during processing at the appropriate resolution of the IFS.  However, interpretation of the IFS land-sea mask by MIR shows a few points change in nature from land to sea or sea to land very slightly modifying the display of geographical features.

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