#!/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 24.521827697754 56.83747081376 -gcp 14175.0 0.0 24.653062820435 56.83930184819 -gcp 14175.0 11517.0 24.654092788696 56.779018510857 -gcp 0.0 11517.0 24.522857666015 56.777187476427 LVVA_F7404_US1_GV66_0002.jpg LVVA_F7404_US1_GV66_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1527.0 909.0\n10668.0 939.0\n10716.0 4713.0\n12969.0 4728.0\n12972.0 10470.0\n9315.0 10446.0\n9294.0 8414.25\n9098.25 8075.25\n9051.0 8022.75\n9000.75 7887.75\n1521.0 7872.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV66_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV66_0002.vrt LVVA_F7404_US1_GV66_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV66_0002.cut.vrt LVVA_F7404_US1_GV66_0002.xyz