#!/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 4716.0 6246.0 22.583443333333335 56.39515 -gcp 40896.0 6300.0 22.625103333333332 56.39515 -gcp 40920.0 40062.0 22.625103333333332 56.37432 -gcp 4722.0 39960.0 22.583443333333335 56.37432 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.JPG LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4716.0 6246.0\n40896.0 6300.0\n40920.0 40062.0\n4722.0 39960.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.vrt LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.cut.vrt LVVA-001679-0217-001769-PLANSETE-026-d-7_1769.xyz