#!/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 4716.0 6468.0 23.041713333333334 56.47847 -gcp 40860.0 6522.0 23.083373333333334 56.47847 -gcp 40908.0 40278.0 23.083373333333334 56.45764 -gcp 4752.0 40194.0 23.041713333333334 56.45764 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.JPG LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4716.0 6468.0\n40860.0 6522.0\n40908.0 40278.0\n4752.0 40194.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.vrt LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.cut.vrt LVVA-001679-0217-002201-PLANSETE-031-a-6_2201.xyz