#!/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 5004.0 6798.0 27.54109 56.54096 -gcp 41244.0 6750.0 27.58275 56.54096 -gcp 41238.0 39642.0 27.58275 56.52013 -gcp 4980.0 39678.0 27.54109 56.52013 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.JPG LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5004.0 6798.0\n41244.0 6750.0\n41238.0 39642.0\n4980.0 39678.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.vrt LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.cut.vrt LVVA-001679-0217-003871-PLANSETE-103-g-10_3871.xyz