mirror of https://github.com/ecmwf/eccodes.git
114 lines
4.2 KiB
Modula-2
114 lines
4.2 KiB
Modula-2
unsigned[2] Nx : dump;
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alias Ni = Nx;
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alias numberOfPointsAlongXAxis = Nx;
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alias geography.Nx=Nx;
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unsigned[2] Ny : dump;
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alias Nj = Ny;
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alias numberOfPointsAlongYAxis = Ny;
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alias geography.Ny=Ny;
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# La1 - latitude of first grid point
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signed[3] latitudeOfFirstGridPoint : edition_specific;
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meta geography.latitudeOfFirstGridPointInDegrees
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scale(latitudeOfFirstGridPoint,oneConstant,grib1divider,truncateDegrees) : dump;
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alias La1 = latitudeOfFirstGridPoint;
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alias La1InDegrees=latitudeOfFirstGridPointInDegrees;
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#meta latitudeOfFirstGridPointInMicrodegrees times(latitudeOfFirstGridPoint,thousand);
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# Lo1 - longitude of first grid point
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signed[3] longitudeOfFirstGridPoint : edition_specific;
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meta geography.longitudeOfFirstGridPointInDegrees
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scale(longitudeOfFirstGridPoint,oneConstant,grib1divider,truncateDegrees) : dump;
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alias Lo1 = longitudeOfFirstGridPoint;
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alias Lo1InDegrees = longitudeOfFirstGridPointInDegrees;
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#meta longitudeOfFirstGridPointInMicrodegrees times(longitudeOfFirstGridPoint,thousand);
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# Resolution and component flags
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include "grib1/resolution_flags.def";
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# LoV - orientation of the grid; i.e. the east longitude value of the meridian which is parallel to the Y-axis
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signed[3] LoV : edition_specific ;
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meta geography.LoVInDegrees
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scale(LoV,oneConstant,grib1divider,truncateDegrees) : dump;
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alias orientationOfTheGrid = LoV;
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alias orientationOfTheGridInDegrees = LoVInDegrees;
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# Dx - X-direction grid length (in units of metres)
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unsigned[3] DxInMetres : dump;
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alias xDirectionGridLength=DxInMetres;
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alias geography.DxInMetres=DxInMetres ;
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alias Dx = DxInMetres;
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alias Di = DxInMetres;
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# Dy - Y-direction grid length (in units of metres)
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unsigned[3] DyInMetres : dump;
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alias yDirectionGridLength=DyInMetres;
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alias geography.DyInMetres=DyInMetres;
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alias Dy= DyInMetres;
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alias Dj = DyInMetres;
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unsigned[1] projectionCentreFlag : dump;
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# Also add the old spelling of "centre" for backward compatibility
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alias projectionCenterFlag=projectionCentreFlag;
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# for change_scanning_direction
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alias yFirst=latitudeOfFirstGridPointInDegrees;
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alias xFirst=longitudeOfFirstGridPointInDegrees;
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include "grib1/scanning_mode.def";
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# Latin 1 - first latitude from the pole at which the secant cone cuts the sphere
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signed[3] Latin1 : edition_specific, no_copy;
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meta geography.Latin1InDegrees scale(Latin1,oneConstant,grib1divider,truncateDegrees) : dump;
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alias firstLatitude=Latin1;
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alias firstLatitudeInDegrees=Latin1InDegrees;
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# GRIB Edition 1 does not have the LaD parameter so we use Latin1 instead
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constant LaDInDegrees = Latin1InDegrees : dump;
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alias geography.LaDInDegrees=LaDInDegrees;
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# Latin 2 - second latitude from the pole at which the secant cone cuts the sphere
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signed[3] Latin2 :edition_specific,no_copy;
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alias secondLatitude=Latin2;
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meta geography.Latin2InDegrees scale(Latin2,oneConstant,grib1divider,truncateDegrees) : dump;
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alias secondLatitudeInDegrees=Latin2InDegrees;
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signed[3] latitudeOfSouthernPole : no_copy;
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meta geography.latitudeOfSouthernPoleInDegrees
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scale(latitudeOfSouthernPole,oneConstant,grib1divider,truncateDegrees) : dump;
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signed[3] longitudeOfSouthernPole : no_copy;
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meta geography.longitudeOfSouthernPoleInDegrees
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scale(longitudeOfSouthernPole,oneConstant,grib1divider,truncateDegrees) : dump;
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meta numberOfDataPoints number_of_points(Nx,Ny,PLPresent,pl) : dump;
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alias numberOfPoints=numberOfDataPoints;
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meta numberOfValues number_of_values(values,bitsPerValue,numberOfDataPoints,
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bitmapPresent,bitmap,numberOfCodedValues) : dump;
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#alias ls.valuesCount=numberOfValues;
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iterator lambert_conformal(numberOfPoints,missingValue,values,
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radius,Nx,Ny,
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LoVInDegrees,LaDInDegrees,
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Latin1InDegrees,Latin2InDegrees,
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latitudeOfFirstGridPointInDegrees,longitudeOfFirstGridPointInDegrees,
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Dx,Dy,
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iScansNegatively,
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jScansPositively,
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jPointsAreConsecutive,
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alternativeRowScanning);
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meta latLonValues latlonvalues(values);
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alias latitudeLongitudeValues=latLonValues;
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meta latitudes latitudes(values,0);
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meta longitudes longitudes(values,0);
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meta distinctLatitudes latitudes(values,1);
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meta distinctLongitudes longitudes(values,1);
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nearest lambert_conformal(values,radius,Nx,Ny);
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pad padding_grid3_1(2);
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