#!/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 25.445709228516 56.633291109461 -gcp 12789.0 0.0 25.570163726807 56.646129092362 -gcp 12789.0 15810.0 25.597715377808 56.564164775357 -gcp 0.0 15810.0 25.477981567383 56.550825813048 LVVA_F7404_US1_GV652_0002.jpg LVVA_F7404_US1_GV652_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"606.0 498.0\n10194.0 645.0\n10218.0 9936.0\n12117.0 9982.5\n12129.0 14301.0\n10119.0 14274.0\n10119.0 14868.0\n516.0 14802.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV652_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV652_0002.vrt LVVA_F7404_US1_GV652_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV652_0002.cut.vrt LVVA_F7404_US1_GV652_0002.xyz