#!/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 5202.0 6708.0 27.332785 56.72842833333333 -gcp 41238.0 6636.0 27.374446666666667 56.72842833333333 -gcp 41256.0 39462.0 27.374446666666667 56.70759833333334 -gcp 5250.0 39522.0 27.332785 56.70759833333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.JPG LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5202.0 6708.0\n41238.0 6636.0\n41256.0 39462.0\n5250.0 39522.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.vrt LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.cut.vrt LVVA-001679-0217-003668-PLANSETE-094-c-5_3668.xyz