#!/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 4290.0 6516.0 24.041575 57.061706666666666 -gcp 40092.0 6438.0 24.062405 57.061706666666666 -gcp 40110.0 39000.0 24.062405 57.051291666666664 -gcp 4494.0 39054.0 24.041575 57.051291666666664 LVVA_F1679_US217_GV6980-6997_GV7004/LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.JPG LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4290.0 6516.0\n40092.0 6438.0\n40110.0 39000.0\n4494.0 39054.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.vrt LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.cut.vrt LVVA-001679-0217-006990-PLANSETE-38-g-6-I_0006.xyz