#!/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 25.743370056152 57.842010064825 -gcp 13182.0 0.0 25.869026184082 57.858635156594 -gcp 13182.0 12108.0 25.904731750488 57.800505219736 -gcp 0.0 12108.0 25.773239135742 57.781473819738 LVVA_F7404_US1_GV1254_0002.jpg LVVA_F7404_US1_GV1254_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"3289.5 5229.0\n2940.0 4704.0\n646.5 4678.5\n645.0 633.0\n6003.0 625.5\n6399.0 405.0\n8068.5 258.0\n9099.0 240.0\n9462.0 330.0\n9693.0 669.0\n12471.0 654.0\n12469.5 10758.75\n9349.5 10797.0\n9237.0 10995.0\n8515.5 11308.5\n8320.5 11313.0\n7983.0 10806.0\n3331.5 10837.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1254_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1254_0002.vrt LVVA_F7404_US1_GV1254_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1254_0002.cut.vrt LVVA_F7404_US1_GV1254_0002.xyz