#!/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 24.299612045288 56.939215386203 -gcp 15738.0 0.0 24.315576553345 56.859484240305 -gcp 15738.0 20520.0 24.124088287354 56.851600322172 -gcp 0.0 20520.0 24.108123779297 56.93133146807 LVVA_F7404_US1_GV37_0002.jpg LVVA_F7404_US1_GV37_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"846.0 9993.0\n850.5 3435.0\n480.0 3433.5\n345.0 2967.0\n420.0 2640.0\n550.5 2376.0\n702.0 2241.0\n837.0 2205.0\n831.0 789.0\n14910.0 789.0\n14909.25 19314.75\n806.625 19201.125\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV37_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV37_0002.vrt LVVA_F7404_US1_GV37_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV37_0002.cut.vrt LVVA_F7404_US1_GV37_0002.xyz