#!/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 26.000862121582 56.963040721713 -gcp 10722.0 0.0 26.105403900146 56.96996546694 -gcp 10722.0 8124.0 26.116046905518 56.926289975867 -gcp 0.0 8124.0 26.011934280396 56.919450809866 LVVA_F7404_US2_GV33_0002.jpg LVVA_F7404_US2_GV33_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1086.0 4194.0\n837.0 3921.0\n897.0 3156.0\n1353.0 2487.0\n2214.0 1758.0\n2814.0 1887.0\n4275.0 2436.0\n5070.0 2724.0\n6213.0 2886.0\n7446.0 2877.0\n7443.0 5844.0\n7062.0 6142.5\n6618.0 6309.0\n5823.0 6630.0\n6052.5 5059.5\n5869.5 4947.0\n5836.5 5043.0\n5737.5 5073.0\n5617.5 5041.5\n5391.0 4911.0\n2661.0 4929.0\n1725.0 4611.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US2_GV33_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US2_GV33_0002.vrt LVVA_F7404_US2_GV33_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US2_GV33_0002.cut.vrt LVVA_F7404_US2_GV33_0002.xyz