#!/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 4248.0 5898.0 21.08365 56.14519166666667 -gcp 40668.0 6024.0 21.125311666666665 56.14519166666667 -gcp 40680.0 39756.0 21.125311666666665 56.124361666666665 -gcp 4242.0 39636.0 21.08365 56.124361666666665 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.JPG LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4248.0 5898.0\n40668.0 6024.0\n40680.0 39756.0\n4242.0 39636.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.vrt LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.cut.vrt LVVA-001679-0217-000521-PLANSETE-007-d-7_0521.xyz