/usr/share/eccodes/definitions/grib2/template.3.12.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.
#
# TEMPLATE 3.12, Transverse Mercator
include "grib2/template.3.shape_of_the_earth.def";
unsigned[4] Ni : dump;
alias numberOfPointsAlongAParallel=Ni;
alias Nx = Ni;
alias geography.Ni=Ni;
unsigned[4] Nj : dump;
alias numberOfPointsAlongAMeridian=Nj;
alias Ny = Nj ;
alias geography.Nj=Nj;
# LaR - geographic latitude of reference point
signed[4] latitudeOfReferencePoint: edition_specific,no_copy ;
alias LaR = latitudeOfReferencePoint;
meta geography.latitudeOfReferencePointInDegrees scale(latitudeOfReferencePoint,oneConstant,grib2divider,truncateDegrees) : dump;
# LoR - geographic longitude of reference point
signed[4] longitudeOfReferencePoint : edition_specific,no_copy;
alias LoR = longitudeOfReferencePoint;
meta geography.longitudeOfReferencePointInDegrees scale(longitudeOfReferencePoint,oneConstant,grib2divider,truncateDegrees) : dump;
include "grib2/template.3.resolution_flags.def";
# m - scale factor at reference point ratio of distance on map to distance on spheroid
# (IEEE 32-bit floating-point values)
ieeefloat scaleFactorAtReferencePoint : edition_specific,no_copy;
alias m = scaleFactorAtReferencePoint;
alias geography.m=m;
# XR - false easting, i-direction coordinate of reference point in units of 10-2 m
signed[4] XR : edition_specific,no_copy;
alias falseEasting = XR;
meta geography.XRInMetres scale(XR,one,hundred) : dump;
# YR - false northing, j-direction coordinate of reference point in units of 10-2 m
signed[4] YR : edition_specific,no_copy ;
alias falseNorthing = YR;
meta geography.YRInMetres scale(YR,one,hundred) : dump;
include "grib2/template.3.scanning_mode.def";
# Di - i-direction increment length in units of 10-2 m
unsigned[4] Di : edition_specific,no_copy;
alias iDirectionIncrementGridLength = Di;
meta geography.DiInMetres scale(Di,oneConstant,hundred,truncateDegrees) : dump;
# Dj - j-direction increment length in units of 10-2 m
unsigned[4] Dj : edition_specific,no_copy;
alias jDirectionIncrementGridLength = Dj;
meta geography.DjInMetres scale(Dj,oneConstant,hundred,truncateDegrees) : dump;
# x1 - i-direction coordinate of the first grid point in units of 10-2 m
signed[4] X1 : no_copy;
meta geography.X1InGridLengths scale(X1,one,hundred) : dump;
# y1 - j-direction coordinate of the first grid point in units of 10-2 m
signed[4] Y1 : no_copy;
meta geography.Y1InGridLengths scale(Y1,one,hundred) : dump;
# x2 - i-direction coordinate of the last grid point in units of 10-2 m
signed[4] X2 : no_copy;
meta geography.X2InGridLengths scale(X2,one,hundred) : dump;
# y2 - j-direction coordinate of the last grid point in units of 10-2 m
signed[4] Y2 : no_copy;
meta geography.Y2InGridLengths scale(Y2,one,hundred) : dump;
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