#!/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 24.176959991455 57.119375167156 -gcp 13830.0 0.0 24.245538711548 57.058656606678 -gcp 13830.0 19896.0 24.086923599243 57.003027405354 -gcp 0.0 19896.0 24.015598297119 57.065750228747 LVVA_F7404_US2_GV82_0002.jpg LVVA_F7404_US2_GV82_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"861.0 6759.0\n693.0 408.0\n6741.0 273.0\n13209.0 330.0\n13350.0 12570.0\n13164.0 18168.0\n7644.0 18228.0\n7500.0 16368.0\n7260.0 15858.0\n7095.0 12969.0\n6993.0 6615.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US2_GV82_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US2_GV82_0002.vrt LVVA_F7404_US2_GV82_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US2_GV82_0002.cut.vrt LVVA_F7404_US2_GV82_0002.xyz