#!/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 4890.0 7410.0 24.541505 56.52013 -gcp 40920.0 7560.0 24.583166666666667 56.52013 -gcp 40884.0 40308.0 24.583166666666667 56.4993 -gcp 4806.0 40284.0 24.541505 56.4993 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.JPG LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4890.0 7410.0\n40920.0 7560.0\n40884.0 40308.0\n4806.0 40284.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.vrt LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.cut.vrt LVVA-001679-0217-003121-PLANSETE-049-g-14_3121.xyz