#!/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 4986.0 7044.0 24.208218333333335 57.082535 -gcp 40530.0 7020.0 24.229048333333335 57.082535 -gcp 40536.0 39540.0 24.229048333333335 57.07212166666667 -gcp 4968.0 39558.0 24.208218333333335 57.07212166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.JPG LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4986.0 7044.0\n40530.0 7020.0\n40536.0 39540.0\n4968.0 39558.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.vrt LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.cut.vrt LVVA-001679-0217-002627-PLANSETE-038-h-2-I_2627.xyz