#!/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 24.859228134155 56.672499321137 -gcp 10767.0 0.0 24.956817626953 56.68796378451 -gcp 10767.0 16137.0 25.001792907715 56.612372834881 -gcp 0.0 16137.0 24.904632568359 56.595034467472 LVVA_F7404_US1_GV711_0002.jpg LVVA_F7404_US1_GV711_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"549.0 846.0\n9903.0 714.0\n10083.0 14937.0\n654.0 14925.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV711_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV711_0002.vrt LVVA_F7404_US1_GV711_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV711_0002.cut.vrt LVVA_F7404_US1_GV711_0002.xyz