#!/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 5568.0 6564.0 27.08282 56.936726666666665 -gcp 41250.0 6582.0 27.124481666666668 56.936726666666665 -gcp 41214.0 39456.0 27.124481666666668 56.91589666666667 -gcp 5520.0 39438.0 27.08282 56.91589666666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.JPG LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5568.0 6564.0\n41250.0 6582.0\n41214.0 39456.0\n5520.0 39438.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.vrt LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.cut.vrt LVVA-001679-0217-003602-PLANSETE-093-a-15_3602.xyz