mirror of https://github.com/ecmwf/eccodes.git
75 lines
2.2 KiB
Modula-2
75 lines
2.2 KiB
Modula-2
# (C) Copyright 2005- ECMWF.
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# GRID DEFINITION Mercator projection
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# grib 1 -> 2
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constant gridDefinitionTemplateNumber = 20;
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signed[2] Ni : dump;
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alias numberOfPointsAlongAParallel=Ni;
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alias Nx=Ni;
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alias geography.Ni=Ni;
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alias numberOfPointsAlongXAxis=Ni;
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signed[2] Nj : dump;
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alias numberOfPointsAlongAMeridian=Nj;
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alias Ny=Nj;
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alias geography.Nj=Nj;
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alias numberOfPointsAlongYAxis=Nj;
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include "grib1/grid_first_last_resandcomp.def";
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signed[3] Latin : edition_specific,no_copy;
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meta geography.LaDInDegrees scale(Latin,oneConstant,grib1divider,truncateDegrees) : dump;
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pad padding_grid1_1(1);
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# for change_scanning_direction
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alias yFirst=latitudeOfFirstGridPointInDegrees;
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alias yLast=latitudeOfLastGridPointInDegrees;
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alias xFirst=longitudeOfFirstGridPointInDegrees;
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alias xLast=longitudeOfLastGridPointInDegrees;
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include "grib1/scanning_mode.def";
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signed[3] DiInMetres: dump;
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alias longitudinalDirectionGridLength=DiInMetres;
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alias Di=DiInMetres;
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alias geography.DiInMetres=DiInMetres;
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alias DxInMetres = DiInMetres;
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signed[3] DjInMetres: dump;
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alias latitudinalDirectionGridLength=DjInMetres;
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alias Dj=DjInMetres;
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alias geography.DjInMetres=DjInMetres;
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alias DyInMetres = DjInMetres;
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constant orientationOfTheGridInDegrees=0;
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pad padding_grid1_2(8);
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meta numberOfDataPoints number_of_points(Ni,Nj) : dump;
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alias numberOfPoints=numberOfDataPoints;
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meta numberOfValues number_of_values(values,bitsPerValue,numberOfDataPoints,bitmapPresent,bitmap,numberOfCodedValues) : dump;
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#alias ls.valuesCount=numberOfValues;
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iterator mercator(numberOfPoints,missingValue,values,
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radius,Ni,Nj,
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latitudeOfFirstGridPointInDegrees, longitudeOfFirstGridPointInDegrees,
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LaDInDegrees,
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latitudeOfLastGridPointInDegrees, longitudeOfLastGridPointInDegrees,
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orientationOfTheGridInDegrees,
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DiInMetres,DjInMetres,
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iScansNegatively,
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jScansPositively,
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jPointsAreConsecutive,
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alternativeRowScanning);
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nearest mercator(values,radius,Nx,Ny);
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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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