#!/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 5286.0 6504.0 26.916176666666665 56.66593833333334 -gcp 41220.0 6426.0 26.937006666666665 56.66593833333334 -gcp 41250.0 39300.0 26.937006666666665 56.655523333333335 -gcp 5292.0 39378.0 26.916176666666665 56.655523333333335 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.JPG LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5286.0 6504.0\n41220.0 6426.0\n41250.0 39300.0\n5292.0 39378.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.vrt LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.cut.vrt LVVA-001679-0217-003547-PLANSETE-085-f-3-I_3547.xyz