#!/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 4974.0 6312.0 23.624965 56.83257666666667 -gcp 40782.0 6342.0 23.666626666666666 56.83257666666667 -gcp 40848.0 40050.0 23.666626666666666 56.811748333333334 -gcp 5046.0 40056.0 23.624965 56.811748333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.JPG LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4974.0 6312.0\n40782.0 6342.0\n40848.0 40050.0\n5046.0 40056.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.vrt LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.cut.vrt LVVA-001679-0217-002328-PLANSETE-032-g-4_2328.xyz