#!/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 4776.0 6588.0 27.99936 56.249341666666666 -gcp 41286.0 6612.0 28.04102 56.249341666666666 -gcp 41232.0 39486.0 28.04102 56.22851166666667 -gcp 4692.0 39456.0 27.99936 56.22851166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.JPG LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4776.0 6588.0\n41286.0 6612.0\n41232.0 39486.0\n4692.0 39456.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.vrt LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.cut.vrt LVVA-001679-0217-004164-PLANSETE-111-a-1_4164.xyz