#!/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 6750.0 5850.0 26.957836666666665 56.10353166666667 -gcp 43242.0 5898.0 26.978668333333335 56.10353166666667 -gcp 43200.0 38352.0 26.978668333333335 56.09311666666667 -gcp 6666.0 38316.0 26.957836666666665 56.09311666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.JPG LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6750.0 5850.0\n43242.0 5898.0\n43200.0 38352.0\n6666.0 38316.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.vrt LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.cut.vrt LVVA-001679-0217-004247-PLANSETE-87-f-16-I_4247.xyz