#!/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 4794.0 6996.0 27.916038333333333 56.37432 -gcp 41196.0 6864.0 27.957698333333333 56.37432 -gcp 41274.0 39738.0 27.957698333333333 56.35349 -gcp 4848.0 39864.0 27.916038333333333 56.35349 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.JPG LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4794.0 6996.0\n41196.0 6864.0\n41274.0 39738.0\n4848.0 39864.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.vrt LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.cut.vrt LVVA-001679-0217-003968-PLANSETE-104-f-11_3968.xyz