Re: I mean regridding the data to a rectiliniear lat / lon grid

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Tue Aug 07 2012 - 10:41:42 MDT

Technically, this is already a rectilinear grid.

       double lat ( lat )
          _CoordinateAxisType : GeoY
          axis : Y
          grid_spacing : 27.0 km
          long_name : y coordinate of projection
          standard_name : projection_y_coordinate
          units : km

       double lon ( lon )
          _CoordinateAxisType : GeoX
          axis : X
          grid_spacing : 27.0 km
          long_name : x coordinate of projection
          standard_name : projection_x_coordinate
          units : km

       float u10 ( time, lat, lon )
          long_name : 10 m u wind (m/sec)
          _FillValue : -9999
          grid_mapping : Lambert_Conformal

The issue is that the poorly named 'lat' and 'lon' variables
should be (say) 'y' and 'x'.

Basically, the projection information

       character Lambert_Conformal ( ncl_scalar )
          grid_mapping_name : lambert_conformal_conic
          long_name :
          latitude_of_projection_origin : 0
          longitude_of_central_meridian : -124.17
          false_easting : 0
          false_northing : -27
          standard_parallel : 0
          _CoordinateTransformType : Projection
          _CoordinateAxisTypes : GeoX GeoY
          earth_shape : Earth spherical with radius of 6,371,229.0 m
          earth_radius : 6371229

must be used to generate two-dimensional latitude and longitude
coordinates for each grid point. Then the data can be plotted on the
lambert map projection. Is this what you want?

*** I have no idea how to do this. Maybe someone else does. ***

Then, if you really want to *regrid* the 2D lat/lon to a rectilinear
lat lon, you would have to use the ESMF regridding
   http://www.ncl.ucar.edu/Applications/ESMF.shtml

On 8/7/12 10:12 AM, Gualberto Hernández Juárez wrote:
> Hi,
>
> I mean regridding the data to a rectiliniear lat / lon grid
>
> locate the file in the directory:
>
> ftp://ftp.cgd.ucar.edu/incoming/
>
>
> or you can download from this link:
>
>
> https://dl.dropbox.com/u/96409134/MMOUT_DOMAIN1.nc
>
>
> Thanks I'll be awaiting your response.
> Gualberto
>
>
>
>
>
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Received on Tue Aug 7 10:42:08 2012

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