auto-sync: 2026-05-14 00:00:01

tasks/enduro-trails/scripts/gen_tri_bilinear.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+set -e
+
+echo '=== REGENERATE TRI TILES WITH BILINEAR RESAMPLING ==='
+echo "Start: $(date)"
+
+TMP='/tmp/tri_gen'
+TERRAIN_DIR='/home/slin/enduro-trails/data/terrain'
+TRI_DIR="${TERRAIN_DIR}/tri"
+
+echo ''
+echo '=== Step 1: Color relief (thresholds x1.3, same as before) ==='
+# tri_raw_full.tif already exists from previous run
+
+cat > $TMP/tri_color_v3.txt << 'RAMP'
+nv    0    0    0    0
+0     0    0    0    0
+3     0    0    0    0
+4     255  255  100  60
+5     255  230  50   100
+6.5   255  200  0    140
+9     255  150  0    180
+13    255  100  0    200
+20    230  50   0    220
+26    200  0    0    235
+39    180  0   50    245
+65    150  0   100   255
+RAMP
+
+gdaldem color-relief \
+  $TMP/tri_raw_full.tif \
+  $TMP/tri_color_v3.txt \
+  $TMP/tri_colored_smooth.tif \
+  -alpha \
+  -of GTiff \
+  -co COMPRESS=LZW \
+  -co BIGTIFF=YES
+echo "Color relief done"
+
+echo ''
+echo '=== Step 2: Generate tiles with bilinear resampling ==='
+rm -rf ${TRI_DIR}
+mkdir -p ${TRI_DIR}
+
+gdal2tiles.py \
+  --zoom=5-12 \
+  --processes=4 \
+  --tilesize=256 \
+  --resampling=bilinear \
+  --webviewer=none \
+  $TMP/tri_colored_smooth.tif \
+  ${TRI_DIR}/
+echo "Tiles generated"
+
+echo ''
+echo '=== Step 3: Stats ==='
+for z in 5 6 7 8 9 10 11 12; do
+  total=$(find ${TRI_DIR}/$z/ -name '*.png' 2>/dev/null | wc -l)
+  nonempty=$(find ${TRI_DIR}/$z/ -name '*.png' -size +400c 2>/dev/null | wc -l)
+  echo "  zoom $z: $total total, $nonempty non-empty"
+done
+
+echo ''
+du -sh ${TRI_DIR}
+echo '=== DONE ==='
+echo "End: $(date)"