#!/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 24.188117980957 57.001718580019 -gcp 10602.0 0.0 24.297380447388 57.00784161664 -gcp 10602.0 8292.0 24.302852153778 56.963473555998 -gcp 0.0 8292.0 24.195885658264 56.959016291995 LVVA_F7404_US2_GV79_0002.jpg LVVA_F7404_US2_GV79_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"444.0 498.0\n3480.0 498.0\n3462.0 729.0\n3600.0 804.0\n3702.0 900.0\n3729.0 1029.0\n3771.0 1146.0\n3861.0 1245.0\n4152.0 1299.0\n4356.0 1410.0\n4497.0 1470.0\n4926.0 1509.0\n5472.0 1521.0\n5832.0 1578.0\n6093.0 1668.0\n7374.0 1656.0\n10110.0 4290.0\n10149.0 7725.0\n5298.0 7761.0\n453.0 7809.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US2_GV79_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US2_GV79_0002.vrt LVVA_F7404_US2_GV79_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US2_GV79_0002.cut.vrt LVVA_F7404_US2_GV79_0002.xyz