#!/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 4830.0 6888.0 26.791193333333332 56.811748333333334 -gcp 40644.0 6930.0 26.832855 56.811748333333334 -gcp 40596.0 39816.0 26.832855 56.79091833333333 -gcp 4770.0 39774.0 26.791193333333332 56.79091833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.JPG LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4830.0 6888.0\n40644.0 6930.0\n40596.0 39816.0\n4770.0 39774.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.vrt LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.cut.vrt LVVA-001679-0217-003463-PLANSETE-084-h-8_3463.xyz