#!/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 4308.0 5712.0 21.08365 56.79091833333333 -gcp 40098.0 5634.0 21.125311666666665 56.79091833333333 -gcp 40272.0 39396.0 21.125311666666665 56.770088333333334 -gcp 4446.0 39462.0 21.08365 56.770088333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.JPG LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4308.0 5712.0\n40098.0 5634.0\n40272.0 39396.0\n4446.0 39462.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.vrt LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.cut.vrt LVVA-001679-0217-000120-PLANSETE-004-g-11_0120.xyz