#!/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 5118.0 6186.0 22.291816666666666 57.165855 -gcp 40572.0 6204.0 22.333478333333332 57.165855 -gcp 40662.0 39948.0 22.333478333333332 57.145025 -gcp 5184.0 39918.0 22.291816666666666 57.145025 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.JPG LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5118.0 6186.0\n40572.0 6204.0\n40662.0 39948.0\n5184.0 39918.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.vrt LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.cut.vrt LVVA-001679-0217-001068-PLANSETE-017-e-4_1068.xyz