#!/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 5136.0 6720.0 27.499428333333334 56.72842833333333 -gcp 41178.0 6678.0 27.54109 56.72842833333333 -gcp 41190.0 39540.0 27.54109 56.70759833333334 -gcp 5100.0 39570.0 27.499428333333334 56.70759833333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.JPG LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5136.0 6720.0\n41178.0 6678.0\n41190.0 39540.0\n5100.0 39570.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.vrt LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.cut.vrt LVVA-001679-0217-003781-PLANSETE-103-a-5_3781.xyz