#!/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 5172.0 7602.0 24.541505 56.43681 -gcp 41346.0 7704.0 24.583166666666667 56.43681 -gcp 41226.0 40548.0 24.583166666666667 56.41598 -gcp 5064.0 40452.0 24.541505 56.41598 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.JPG LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5172.0 7602.0\n41346.0 7704.0\n41226.0 40548.0\n5064.0 40452.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.vrt LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.cut.vrt LVVA-001679-0217-003169-PLANSETE-050-a-14_3169.xyz