eccodes/tests/grib_change_scanning.sh

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#!/bin/sh
# (C) Copyright 2005- ECMWF.
#
# 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.ctest.sh
label="grib_change_scanning_test"
editions="1 2"
gridTypes="regular_ll rotated_ll"
Ni_list="5 8"
Nj_list="7 4"
file=${data_dir}/regular_latlon_surface.grib1
for edition in `echo ${editions}`; do
for gridType in `echo $gridTypes`; do
for Ni in `echo ${Ni_list}`; do
for Nj in `echo ${Nj_list}`; do
#echo $gridType Ni=$Ni Nj=$Nj
N=`expr $Ni \* $Nj`
cat > ${data_dir}/change_scanning_${gridType}.filter <<EOF
set edition=$edition;
set gridType="$gridType";
set Ni=$Ni;
set Nj=$Nj;
set latitudeFirstInDegrees=20.0;
set longitudeFirstInDegrees=20.0;
set latitudeLastInDegrees=`expr 20 - $Nj + 1`;
set longitudeLastInDegrees=`expr 20 + $Ni - 1`;
set DiInDegrees=1.0;
set DjInDegrees=1.0;
set iScansNegatively=0;
set jScansPositively=0;
set jPointsAreConsecutive=0;
set values = {1
EOF
list=""
i=2
while [ $i -le $N ]; do
list="$list,$i"
i=`expr $i + 1`
done
cat >> ${data_dir}/change_scanning_${gridType}.filter <<EOF
$list };
write "${data_dir}/scan1.grib";
EOF
${tools_dir}/grib_filter ${data_dir}/change_scanning_${gridType}.filter $file
#ed=`${tools_dir}/grib_get -p edition ${data_dir}/scan1.grib`
#echo edition=$ed
${tools_dir}/grib_set -s swapScanningX=1 ${data_dir}/scan1.grib ${data_dir}/scan.grib
${tools_dir}/grib_get_data -F "%g" ${data_dir}/scan.grib > ${data_dir}/scan_x_${gridType}_${Ni}_${Nj}.dump
diff ${data_dir}/scan_x_${gridType}_${Ni}_${Nj}.dump ${data_dir}/scan_x_${gridType}_${Ni}_${Nj}_good.dump
rm -f ${data_dir}/scan_x_${gridType}_${Ni}_${Nj}.dump
${tools_dir}/grib_set -s swapScanningY=1 ${data_dir}/scan1.grib ${data_dir}/scan.grib
${tools_dir}/grib_get_data -F "%g" ${data_dir}/scan.grib > ${data_dir}/scan_y_${gridType}_${Ni}_${Nj}.dump
diff ${data_dir}/scan_y_${gridType}_${Ni}_${Nj}.dump ${data_dir}/scan_y_${gridType}_${Ni}_${Nj}_good.dump
rm -f ${data_dir}/scan_y_${gridType}_${Ni}_${Nj}.dump
rm -f ${data_dir}/change_scanning_${gridType}.filter
done
done
done
done
# alternativeRowScanning
# -----------------------
tempFilt=temp.$label.filt
tempGribA=temp.$label.A.grib
tempGribB=temp.$label.B.grib
tempText=temp.$label.txt
tempRef=temp.$label.ref
cat > $tempFilt <<EOF
set Nj = 2;
set latitudeOfFirstGridPointInDegrees = 60;
set latitudeOfLastGridPointInDegrees = 59;
set Ni = 3;
set longitudeOfFirstGridPointInDegrees = 0;
set longitudeOfLastGridPointInDegrees = 2;
set DjInDegrees = 1;
set DiInDegrees = 1;
set alternativeRowScanning = 1;
set values={ 12, 13, 14, 15, 16, 17 };
write;
EOF
${tools_dir}/grib_filter -o $tempGribA $tempFilt $ECCODES_SAMPLES_PATH/GRIB2.tmpl
${tools_dir}/grib_set -s swapScanningAlternativeRows=1 $tempGribA $tempGribB
grib_check_key_equals $tempGribB alternativeRowScanning 0
${tools_dir}/grib_get_data -F "%.2f" $tempGribB > $tempText
cat > $tempRef << EOF
Latitude Longitude Value
60.000 0.000 12.00
60.000 1.000 13.00
60.000 2.000 14.00
59.000 0.000 17.00
59.000 1.000 16.00
59.000 2.000 15.00
EOF
diff $tempRef $tempText
# It must fail when Ni=missing (reduced grids)
set +e
${tools_dir}/grib_set -s swapScanningAlternativeRows=1 $ECCODES_SAMPLES_PATH/reduced_gg_pl_96_grib2.tmpl $tempGribB 2>/dev/null
status=$?
set -e
[ $status -ne 0 ]
# ECC-1492
grib_check_key_equals "$ECCODES_SAMPLES_PATH/GRIB1.tmpl" iScansNegatively,iScansPositively '0 1'
grib_check_key_equals "$ECCODES_SAMPLES_PATH/GRIB1.tmpl" jScansNegatively,jScansPositively '1 0'
grib_check_key_equals "$ECCODES_SAMPLES_PATH/GRIB2.tmpl" iScansNegatively,iScansPositively '0 1'
grib_check_key_equals "$ECCODES_SAMPLES_PATH/GRIB2.tmpl" jScansNegatively,jScansPositively '1 0'
# Clean up
rm -f $tempFilt $tempGribA $tempGribB $tempRef $tempText
rm -f ${data_dir}/scan1.grib ${data_dir}/scan.grib