#!/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 4518.0 5778.0 21.291955 56.811748333333334 -gcp 40356.0 5826.0 21.333616666666668 56.811748333333334 -gcp 40398.0 39564.0 21.333616666666668 56.79091833333333 -gcp 4560.0 39516.0 21.291955 56.79091833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.JPG LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4518.0 5778.0\n40356.0 5826.0\n40398.0 39564.0\n4560.0 39516.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.vrt LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.cut.vrt LVVA-001679-0217-000132-PLANSETE-004-h-8_0132.xyz