#!/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 5214.0 6642.0 27.54109 56.64510833333333 -gcp 41352.0 6618.0 27.58275 56.64510833333333 -gcp 41352.0 39492.0 27.58275 56.624278333333336 -gcp 5190.0 39516.0 27.54109 56.624278333333336 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.JPG LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5214.0 6642.0\n41352.0 6618.0\n41352.0 39492.0\n5190.0 39516.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.vrt LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.cut.vrt LVVA-001679-0217-003823-PLANSETE-103-d-6_3823.xyz