#!/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 5748.0 7668.0 26.791193333333332 56.082701666666665 -gcp 42342.0 7668.0 26.832855 56.082701666666665 -gcp 42288.0 40242.0 26.832855 56.06187166666667 -gcp 5688.0 40218.0 26.791193333333332 56.06187166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.JPG LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5748.0 7668.0\n42342.0 7668.0\n42288.0 40242.0\n5688.0 40218.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.vrt LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.cut.vrt LVVA-001679-0217-004233-PLANSETE-87-h-4_4233.xyz