#!/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 4728.0 6492.0 23.083373333333334 56.45764 -gcp 40878.0 6504.0 23.125035 56.45764 -gcp 40956.0 40266.0 23.125035 56.43681 -gcp 4794.0 40236.0 23.083373333333334 56.43681 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.JPG LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4728.0 6492.0\n40878.0 6504.0\n40956.0 40266.0\n4794.0 40236.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.vrt LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.cut.vrt LVVA-001679-0217-002206-PLANSETE-031-a-11_2206.xyz