eccodes/definitions/grib2/template.3.140.def

# (C) Copyright 2005- ECMWF.

# TEMPLATE 3.140, Lambert azimuthal equal area projection
include "grib2/template.3.shape_of_the_earth.def";

#  Nx - number of points along X-axis
unsigned[4] numberOfPointsAlongXAxis : dump  ;
alias Nx  = numberOfPointsAlongXAxis;
alias Ni  = Nx;

#  Ny - number of points along Y-axis
unsigned[4] numberOfPointsAlongYAxis : dump  ;
alias Ny =  numberOfPointsAlongYAxis;
alias Nj  = Ny;

#  La1 - latitude of first grid point
signed[4] latitudeOfFirstGridPoint: edition_specific ;
alias La1 =  latitudeOfFirstGridPoint;
meta geography.latitudeOfFirstGridPointInDegrees   scale(latitudeOfFirstGridPoint
                                                 ,one,grib2divider,truncateDegrees) : dump;
#meta latitudeOfFirstGridPointInMicrodegrees times(latitudeOfFirstGridPoint,mAngleMultiplier,angleDivisor): no_copy;

#  Lo1 - longitude of first grid point
signed[4] longitudeOfFirstGridPoint: edition_specific ;
alias La1 =  longitudeOfFirstGridPoint;
meta geography.longitudeOfFirstGridPointInDegrees   scale(longitudeOfFirstGridPoint
                                                 ,one,grib2divider,truncateDegrees) : dump;
#meta longitudeOfFirstGridPointInMicrodegrees times(longitudeOfFirstGridPoint,mAngleMultiplier,angleDivisor) : no_copy;

signed[4] standardParallelInMicrodegrees  : dump;
alias standardParallel=standardParallelInMicrodegrees;
meta geography.standardParallelInDegrees scale(standardParallelInMicrodegrees,one,grib2divider,truncateDegrees) : dump;

signed[4] centralLongitudeInMicrodegrees  : dump;
alias centralLongitude=centralLongitudeInMicrodegrees;
meta geography.centralLongitudeInDegrees scale(centralLongitudeInMicrodegrees,one,grib2divider,truncateDegrees) : dump;

#  Resolution and component flag
flags[1] resolutionAndComponentFlags 'grib2/tables/[tablesVersion]/3.3.table' : dump ;

#  Dx - X-direction grid length in millimetres
unsigned[4] xDirectionGridLengthInMillimetres  : dump ;
alias Dx  = xDirectionGridLengthInMillimetres ;
meta geography.xDirectionGridLengthInMetres scale(xDirectionGridLengthInMillimetres,one,thousand,truncateDegrees): dump;
alias DxInMetres = xDirectionGridLengthInMetres;

#  Dy - Y-direction grid length in millimetres
unsigned[4] yDirectionGridLengthInMillimetres  : dump ;
alias Dy  = yDirectionGridLengthInMillimetres ;
meta geography.yDirectionGridLengthInMetres scale(yDirectionGridLengthInMillimetres,one,thousand,truncateDegrees): dump;
alias DyInMetres = yDirectionGridLengthInMetres;

include "grib2/template.3.scanning_mode.def";

iterator lambert_azimuthal_equal_area(numberOfPoints,missingValue,values,
          radius,Nx,Ny,
          latitudeOfFirstGridPointInDegrees,longitudeOfFirstGridPointInDegrees,
          standardParallelInDegrees,centralLongitudeInDegrees,
          Dx,Dy,
          iScansNegatively, jScansPositively,
          jPointsAreConsecutive, alternativeRowScanning);

nearest lambert_azimuthal_equal_area(values,radius,Nx,Ny);

meta latLonValues latlonvalues(values);
alias latitudeLongitudeValues=latLonValues;
meta latitudes latitudes(values,0);
meta longitudes longitudes(values,0);
meta distinctLatitudes latitudes(values,1);
meta distinctLongitudes longitudes(values,1);