#!/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 4374.0 5586.0 21.333616666666668 56.52013 -gcp 40452.0 5766.0 21.375276666666668 56.52013 -gcp 40416.0 39522.0 21.375276666666668 56.4993 -gcp 4308.0 39324.0 21.333616666666668 56.4993 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.JPG LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4374.0 5586.0\n40452.0 5766.0\n40416.0 39522.0\n4308.0 39324.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.vrt LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.cut.vrt LVVA-001679-0217-000285-PLANSETE-005-i-13_0285.xyz