/usr/share/eccodes/definitions/grib2/template.3.latlon.def is in libeccodes-data 2.0.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
#
# In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
# virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
#
include "grib2/template.3.grid.def";
# Di - i direction increment
unsigned[4] iDirectionIncrement : can_be_missing,edition_specific;
alias Di = iDirectionIncrement;
alias Dx = iDirectionIncrement;
# Dj - j direction increment
unsigned[4] jDirectionIncrement : can_be_missing,edition_specific;
alias Dj = jDirectionIncrement;
alias Dy = jDirectionIncrement;
include "grib2/template.3.scanning_mode.def";
meta g2grid g2grid(
latitudeOfFirstGridPoint,
longitudeOfFirstGridPoint,
latitudeOfLastGridPoint,
longitudeOfLastGridPoint,
iDirectionIncrement,
jDirectionIncrement,
basicAngleOfTheInitialProductionDomain,
subdivisionsOfBasicAngle
);
meta geography.latitudeOfFirstGridPointInDegrees g2latlon(g2grid,0) : dump;
meta geography.longitudeOfFirstGridPointInDegrees g2latlon(g2grid,1) : dump;
meta geography.latitudeOfLastGridPointInDegrees g2latlon(g2grid,2) : dump;
meta geography.longitudeOfLastGridPointInDegrees g2latlon(g2grid,3) : dump;
alias xFirst=longitudeOfFirstGridPointInDegrees;
alias yFirst=latitudeOfFirstGridPointInDegrees;
alias xLast=longitudeOfLastGridPointInDegrees;
alias yLast=latitudeOfLastGridPointInDegrees;
meta geography.iDirectionIncrementInDegrees g2latlon(g2grid,4,
iDirectionIncrementGiven) : can_be_missing,dump;
meta geography.jDirectionIncrementInDegrees g2latlon(g2grid,5,
jDirectionIncrementGiven) : can_be_missing,dump;
alias latitudeFirstInDegrees = latitudeOfFirstGridPointInDegrees;
alias longitudeFirstInDegrees = longitudeOfFirstGridPointInDegrees;
alias latitudeLastInDegrees = latitudeOfLastGridPointInDegrees;
alias longitudeLastInDegrees = longitudeOfLastGridPointInDegrees;
alias DiInDegrees = iDirectionIncrementInDegrees;
alias DxInDegrees = iDirectionIncrementInDegrees;
alias DjInDegrees = jDirectionIncrementInDegrees;
alias DyInDegrees = jDirectionIncrementInDegrees;
_if ( missing(Ni) && PLPresent == 1 ) {
iterator latlon_reduced(numberOfPoints,missingValue,values,
latitudeFirstInDegrees,longitudeFirstInDegrees,
latitudeLastInDegrees,longitudeLastInDegrees,
Nj,DjInDegrees,pl);
nearest latlon_reduced(values,radius,Nj,pl,longitudeFirstInDegrees,longitudeLastInDegrees);
} else {
iterator latlon(numberOfPoints,missingValue,values,
longitudeFirstInDegrees,DiInDegrees ,
Ni,Nj,iScansNegatively,
latitudeFirstInDegrees, DjInDegrees,jScansPositively);
nearest regular(values,radius,Ni,Nj);
}
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);
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