#!/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 4794.0 5694.0 21.175305 56.895066666666665 -gcp 40518.0 5802.0 21.183636666666665 56.895066666666665 -gcp 40530.0 39582.0 21.183636666666665 56.890901666666664 -gcp 4788.0 39462.0 21.175305 56.890901666666664 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.JPG LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4794.0 5694.0\n40518.0 5802.0\n40530.0 39582.0\n4788.0 39462.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.vrt LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.cut.vrt LVVA-001679-0217-000092-PLANSETE-004-e-5-II_0092.xyz