#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 23.098038919542116 56.99858572398944 -gcp 0.0 16128.0 23.127621856234104 56.99561397565332 -gcp 12000.0 16128.0 23.123566894086633 56.983600578716135 -gcp 12000.0 0.0 23.093993182640617 56.9865714031767 11_Rajons_Tukums_II/LNA_KFFDA_F106_1_4654N.jpg LNA_KFFDA_F106_1_4654N.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 16128.0\n12000.0 16128.0\n12000.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4654N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4654N.vrt LNA_KFFDA_F106_1_4654N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4654N.cut.vrt LNA_KFFDA_F106_1_4654N.xyz