#!/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 4902.0 6096.0 22.833408333333335 56.83257666666667 -gcp 40686.0 6036.0 22.87507 56.83257666666667 -gcp 40836.0 39798.0 22.87507 56.811748333333334 -gcp 5016.0 39828.0 22.833408333333335 56.811748333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.JPG LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4902.0 6096.0\n40686.0 6036.0\n40836.0 39798.0\n5016.0 39828.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.vrt LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.cut.vrt LVVA-001679-0217-001600-PLANSETE-024-i-1_1600.xyz