#!/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 25.244607925415 56.71939175613 -gcp 10488.0 0.0 25.321168899536 56.729139928377 -gcp 10488.0 8601.0 25.337047576904 56.688058060543 -gcp 0.0 8601.0 25.258169174194 56.678157788198 LVVA_F7404_US1_GV661_0002.jpg LVVA_F7404_US1_GV661_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"600.0 2757.0\n1461.0 2781.0\n2172.0 2763.0\n2365.5 2457.0\n2538.0 2361.0\n2743.5 2295.0\n3085.5 2319.0\n3273.0 2322.0\n3369.0 2307.0\n3331.5 2247.0\n3058.5 1927.5\n2820.0 1591.5\n2637.0 1167.0\n6288.0 1209.0\n6183.0 618.0\n6246.0 510.0\n10017.0 570.0\n9993.0 7596.0\n486.0 7539.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV661_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV661_0002.vrt LVVA_F7404_US1_GV661_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV661_0002.cut.vrt LVVA_F7404_US1_GV661_0002.xyz