#!/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 25.327177047729 56.663774185802 -gcp 10437.0 0.0 25.429916381836 56.66726448237 -gcp 10437.0 8685.0 25.436182022095 56.625548449479 -gcp 0.0 8685.0 25.332841873169 56.621487639162 LVVA_F7404_US1_GV648_0002.jpg LVVA_F7404_US1_GV648_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"324.0 558.0\n7500.0 552.0\n7494.0 3819.0\n7809.0 4011.0\n9789.0 4041.0\n9816.0 7638.0\n426.0 7650.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV648_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV648_0002.vrt LVVA_F7404_US1_GV648_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV648_0002.cut.vrt LVVA_F7404_US1_GV648_0002.xyz