#!/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 6720.0 8304.0 27.332785 56.35349 -gcp 43038.0 8058.0 27.374446666666667 56.35349 -gcp 43236.0 40476.0 27.374446666666667 56.33266 -gcp 6882.0 40710.0 27.332785 56.33266 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.JPG LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6720.0 8304.0\n43038.0 8058.0\n43236.0 40476.0\n6882.0 40710.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.vrt LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.cut.vrt LVVA-001679-0217-004369-PLANSETE-95-f-13_4369.xyz