#!/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 4794.0 7476.0 25.20808 56.60344833333333 -gcp 40794.0 7548.0 25.24974 56.60344833333333 -gcp 40728.0 40392.0 25.24974 56.582618333333336 -gcp 4698.0 40356.0 25.20808 56.582618333333336 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.JPG LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4794.0 7476.0\n40794.0 7548.0\n40728.0 40392.0\n4698.0 40356.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.vrt LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.cut.vrt LVVA-001679-0217-003318-PLANSETE-058-e-14_3318.xyz