#!/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 4752.0 6498.0 23.083373333333334 56.582618333333336 -gcp 40758.0 6528.0 23.125035 56.582618333333336 -gcp 40872.0 40290.0 23.125035 56.56179 -gcp 4824.0 40272.0 23.083373333333334 56.56179 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.JPG LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4752.0 6498.0\n40758.0 6528.0\n40872.0 40290.0\n4824.0 40272.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.vrt LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.cut.vrt LVVA-001679-0217-002150-PLANSETE-030-g-3_2150.xyz