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ECC-1784: Add support for N=1 nested

This commit is contained in:
shahramn 2024-03-12 11:59:49 +00:00
parent f46e49b185
commit 1bbca16e3f
2 changed files with 18 additions and 20 deletions
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12
src/grib_iterator_class_healpix.cc
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@ -265,8 +265,8 @@ static int iterate_healpix(grib_iterator_healpix* self, long N)
p -= 8 * Nside;
}
int i = (r + p) >> 1;
int j = (r - p) >> 1;
int i = std::max(0, (r + p)) >> 1;
int j = std::max(0, (r - p)) >> 1;
Assert(f < 12 && i < Nside && j < Nside);
return CodecFijNest::fij_to_nest(f, i, j, k);
@ -362,10 +362,10 @@ static int init(grib_iterator* iter, grib_handle* h, grib_arguments* args)
grib_context_log(h->context, GRIB_LOG_ERROR, "%s: Only orderingConvention=(ring|nested) are supported", ITER);
return GRIB_GEOCALCULUS_PROBLEM;
}
if (self->nested && N == 1) {
grib_context_log(h->context, GRIB_LOG_ERROR, "%s: For orderingConvention=nested, N must be greater than 1", ITER);
return GRIB_GEOCALCULUS_PROBLEM;
}
// if (self->nested && N == 1) {
// grib_context_log(h->context, GRIB_LOG_ERROR, "%s: For orderingConvention=nested, N must be greater than 1", ITER);
// return GRIB_GEOCALCULUS_PROBLEM;
// }
if (grib_is_earth_oblate(h)) {
grib_context_log(h->context, GRIB_LOG_ERROR, "%s: Only spherical earth is supported", ITER);

26
tests/grib_grid_healpix.sh
View File

@ -19,7 +19,8 @@ input=$ECCODES_SAMPLES_PATH/GRIB2.tmpl
latest=`${tools_dir}/grib_get -p tablesVersionLatest $input`
# Create a filter
# Check basic keys and grid template
# -----------------------------------
cat > $tempFilt <<EOF
set tablesVersion = $latest;
set gridType = "healpix";
@ -45,8 +46,8 @@ ${tools_dir}/grib_dump -O -p section_3 $tempGrib
${tools_dir}/grib_ls -jn geography $tempGrib > $tempLog
grep -q "orderingConvention.*ring" $tempLog
# Geoiterator
# -------------
# Geoiterator ring-ordering
# --------------------------
rm -f $tempGrib
cat > $tempFilt <<EOF
set tablesVersion = $latest;
@ -73,8 +74,8 @@ EOF
${tools_dir}/grib_filter $tempFilt $tempGrib
# Nested ordering
# ---------------
# Geoiterator Nested ordering
# ---------------------------
rm -f $tempGrib
cat > $tempFilt <<EOF
set tablesVersion = $latest;
@ -105,16 +106,13 @@ set -e
grep -q "Nside must be a power of 2" $tempLog
# Nested. Bad N
${tools_dir}/grib_set -s gridType=healpix,Nside=1,orderingConvention=nested $input $tempGrib
set +e
${tools_dir}/grib_get_data $tempGrib > $tempLog 2>&1
status=$?
set -e
[ $status -ne 0 ]
cat $tempLog
grep -q "N must be greater than 1" $tempLog
# Nested N=1
input=$ECCODES_SAMPLES_PATH/GRIB2.tmpl
${tools_dir}/grib_set -s gridType=healpix,Nside=1,orderingConvention=nested,numberOfDataPoints=12,numberOfValues=12 $input $tempGrib
${tools_dir}/grib_get_data $tempGrib > $tempLog
# Invalid cases
# ------------------
# Bad ordering
${tools_dir}/grib_set -s gridType=healpix,Nside=1,ordering=6 $input $tempGrib
set +e