#!/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 3336.0 5418.0 24.062405 57.07212166666667 -gcp 38988.0 6054.0 24.083235 57.07212166666667 -gcp 38490.0 38628.0 24.083235 57.061706666666666 -gcp 4452.0 38010.0 24.062405 57.061706666666666 LVVA_F1679_US217_GV6980-6997_GV7004/LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.JPG LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3336.0 5418.0\n38988.0 6054.0\n38490.0 38628.0\n4452.0 38010.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.vrt LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.cut.vrt LVVA-001679-0217-006980-PLANSETE-38-g-2-IV_0001.xyz