#!/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 4362.0 6000.0 20.958668333333332 56.35349 -gcp 40614.0 6090.0 20.979498333333332 56.35349 -gcp 40662.0 39864.0 20.979498333333332 56.343075 -gcp 4356.0 39756.0 20.958668333333332 56.343075 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.JPG LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4362.0 6000.0\n40614.0 6090.0\n40662.0 39864.0\n4356.0 39756.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.vrt LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.cut.vrt LVVA-001679-0217-000374-PLANSETE-0K6-d-13-I_0374.xyz