#!/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 4404.0 5934.0 21.291955 56.22851166666667 -gcp 40740.0 6018.0 21.333616666666668 56.22851166666667 -gcp 40770.0 39774.0 21.333616666666668 56.207681666666666 -gcp 4380.0 39684.0 21.291955 56.207681666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.JPG LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4404.0 5934.0\n40740.0 6018.0\n40770.0 39774.0\n4380.0 39684.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.vrt LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.cut.vrt LVVA-001679-0217-000496-PLANSETE-007-b-8_0496.xyz