mirror of https://github.com/ecmwf/eccodes.git
93 lines
3.6 KiB
Modula-2
93 lines
3.6 KiB
Modula-2
unsigned[2] Ni : can_be_missing,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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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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# Latitudes and Longitudes of the first and the last points
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# Resolution and component flags
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include "grib1/grid_first_last_resandcomp.def";
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# Di - i direction increment
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unsigned[2] iDirectionIncrement : can_be_missing,dump,edition_specific;
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meta geography.iDirectionIncrementInDegrees scale(iDirectionIncrement,oneConstant,grib1divider,truncateDegrees) : can_be_missing,dump;
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alias Di = iDirectionIncrement;
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# N - number of parallels between a pole and the equator
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unsigned[2] N : dump ;
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alias numberOfParallelsBetweenAPoleAndTheEquator=N;
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alias geography.N=N;
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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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pad padding_grid4_1(4);
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alias latitudeFirstInDegrees = latitudeOfFirstGridPointInDegrees;
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alias longitudeFirstInDegrees = longitudeOfFirstGridPointInDegrees;
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alias latitudeLastInDegrees = latitudeOfLastGridPointInDegrees;
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alias longitudeLastInDegrees = longitudeOfLastGridPointInDegrees;
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alias DiInDegrees = iDirectionIncrementInDegrees;
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meta global global_gaussian(N,Ni,iDirectionIncrement,
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latitudeOfFirstGridPoint,
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longitudeOfFirstGridPoint,
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latitudeOfLastGridPoint,
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longitudeOfLastGridPoint,
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PLPresent,pl) = 0 : dump;
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# With legacy mode support
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meta numberOfDataPoints number_of_points_gaussian(Ni,Nj,PLPresent,pl,N,
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latitudeOfFirstGridPointInDegrees,longitudeOfFirstGridPointInDegrees,
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latitudeOfLastGridPointInDegrees,longitudeOfLastGridPointInDegrees,one) : dump;
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# Use the new algorithm for counting. No support for legacy mode
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meta numberOfDataPointsExpected number_of_points_gaussian(Ni,Nj,PLPresent,pl,N,
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latitudeOfFirstGridPointInDegrees,longitudeOfFirstGridPointInDegrees,
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latitudeOfLastGridPointInDegrees,longitudeOfLastGridPointInDegrees,zero) : dump;
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meta legacyGaussSubarea evaluate(numberOfDataPoints != numberOfDataPointsExpected);
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alias numberOfPoints=numberOfDataPoints;
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# alias numberOfExpectedPoints=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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if(missing(Ni)){
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iterator gaussian_reduced(numberOfPoints,missingValue,values,
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latitudeOfFirstGridPointInDegrees,longitudeOfFirstGridPointInDegrees,
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latitudeOfLastGridPointInDegrees,longitudeOfLastGridPointInDegrees,
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N,pl,Nj);
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nearest reduced(values,radius,Nj,pl);
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#meta sumPlArray sum(pl);
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#meta dataGlobal evaluate( sumPlArray == (numberOfValues+numberOfMissing) );
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} else {
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iterator gaussian(numberOfPoints,missingValue,values,longitudeFirstInDegrees,
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DiInDegrees ,Ni,Nj,iScansNegatively ,
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latitudeFirstInDegrees, latitudeLastInDegrees,
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N,jScansPositively);
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nearest regular(values,radius,Ni,Nj);
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}
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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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meta isOctahedral octahedral_gaussian(N, Ni, PLPresent, pl) = 0 : no_copy,dump;
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meta gaussianGridName gaussian_grid_name(N, Ni, isOctahedral);
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alias gridName=gaussianGridName;
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