#!/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 4992.0 6588.0 27.99936 56.60344833333333 -gcp 41148.0 6480.0 28.04102 56.60344833333333 -gcp 41190.0 39366.0 28.04102 56.582618333333336 -gcp 5004.0 39450.0 27.99936 56.582618333333336 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.JPG LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4992.0 6588.0\n41148.0 6480.0\n41190.0 39366.0\n5004.0 39450.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.vrt LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.cut.vrt LVVA-001679-0217-004093-PLANSETE-109-d-13_4093.xyz