#!/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 5958.0 27.666073333333333 56.06187166666667 -gcp 41418.0 5886.0 27.707733333333334 56.06187166666667 -gcp 41460.0 38622.0 27.707733333333334 56.041043333333334 -gcp 4824.0 38682.0 27.666073333333333 56.041043333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.JPG LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4794.0 5958.0\n41418.0 5886.0\n41460.0 38622.0\n4824.0 38682.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.vrt LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.cut.vrt LVVA-001679-0217-004361-PLANSETE-105-h-5_4361.xyz