#!/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 26.749820709229 57.309187563908 -gcp 10653.0 0.0 26.852791175122 57.309972702435 -gcp 10653.0 8298.0 26.854104995728 57.266188936358 -gcp 0.0 8298.0 26.75085067749 57.264703728397 LVVA_F7404_US1_GV1819_0003.jpg LVVA_F7404_US1_GV1819_0003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"5461.5 7231.5\n784.5 7226.25\n756.0 1017.0\n871.5 621.0\n1116.0 264.0\n2517.0 270.0\n5466.0 288.0\n9789.0 286.5\n9897.0 361.5\n10078.5 1157.25\n10044.75 3979.5\n10248.0 3984.0\n10230.0 7197.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1819_0003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1819_0003.vrt LVVA_F7404_US1_GV1819_0003.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1819_0003.cut.vrt LVVA_F7404_US1_GV1819_0003.xyz