#!/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 4920.0 4974.0 26.853685 56.21809666666667 -gcp 41268.0 4824.0 26.874515 56.21809666666667 -gcp 41352.0 37344.0 26.874515 56.207681666666666 -gcp 5034.0 37488.0 26.853685 56.207681666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.JPG LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4920.0 4974.0\n41268.0 4824.0\n41352.0 37344.0\n5034.0 37488.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.vrt LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.cut.vrt LVVA-001679-0217-004241-PLANSETE-87-c-5-IV_4241.xyz