#!/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 4968.0 6906.0 27.624411666666667 56.45764 -gcp 41268.0 6768.0 27.666073333333333 56.45764 -gcp 41340.0 39654.0 27.666073333333333 56.43681 -gcp 5016.0 39774.0 27.624411666666667 56.43681 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.JPG LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4968.0 6906.0\n41268.0 6768.0\n41340.0 39654.0\n5016.0 39774.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.vrt LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.cut.vrt LVVA-001679-0217-003918-PLANSETE-104-a-12_3918.xyz