#!/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 5286.0 6036.0 22.333478333333332 57.145025 -gcp 40800.0 6168.0 22.375138333333332 57.145025 -gcp 40746.0 39942.0 22.375138333333332 57.124195 -gcp 5238.0 39780.0 22.333478333333332 57.124195 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.JPG LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5286.0 6036.0\n40800.0 6168.0\n40746.0 39942.0\n5238.0 39780.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.vrt LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.cut.vrt LVVA-001679-0217-001075-PLANSETE-017-f-5_1075.xyz