#!/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 6684.0 8040.0 27.311955 56.31183166666667 -gcp 43062.0 8094.0 27.332785 56.31183166666667 -gcp 42990.0 40836.0 27.332785 56.30141666666667 -gcp 6594.0 40776.0 27.311955 56.30141666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.JPG LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6684.0 8040.0\n43062.0 8094.0\n42990.0 40836.0\n6594.0 40776.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.vrt LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.cut.vrt LVVA-001679-0217-004327-PLANSETE-95-h-8-II_4327.xyz