#!/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 27.192621231079 57.423281634344 -gcp 15060.0 0.0 27.320852279663 57.433262428778 -gcp 15060.0 12402.0 27.338619232178 57.37227244658 -gcp 0.0 12402.0 27.213478088379 57.362506477289 LVVA_F7404_US1_GV1809_0002.jpg LVVA_F7404_US1_GV1809_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"723.75 4594.125\n723.0 1146.0\n7508.25 1177.5\n14316.0 1236.0\n14262.0 8148.0\n7620.0 8097.0\n7611.0 11247.75\n3259.5 11223.0\n3242.25 8218.125\n3153.0 8153.25\n3066.75 8080.5\n726.0 8034.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1809_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1809_0002.vrt LVVA_F7404_US1_GV1809_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1809_0002.cut.vrt LVVA_F7404_US1_GV1809_0002.xyz