#!/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 26.623048782349 57.454324058526 -gcp 9696.0 0.0 26.740121841431 57.459679906931 -gcp 9696.0 8010.0 26.750764846802 57.416302703294 -gcp 0.0 8010.0 26.631546020508 57.4100159049 LVVA_F7404_US1_GV446_0002.jpg LVVA_F7404_US1_GV446_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"283.5 3864.0\n312.0 285.0\n6791.25 375.0\n6693.0 2568.0\n6678.0 4479.0\n9252.0 4512.0\n9352.5 7384.5\n6732.0 7290.0\n192.0 7329.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV446_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV446_0002.vrt LVVA_F7404_US1_GV446_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV446_0002.cut.vrt LVVA_F7404_US1_GV446_0002.xyz