#!/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 4986.0 5574.0 26.999498333333335 56.4993 -gcp 41262.0 5562.0 27.041158333333332 56.4993 -gcp 41256.0 38412.0 27.041158333333332 56.47847 -gcp 4950.0 38418.0 26.999498333333335 56.47847 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.JPG LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4986.0 5574.0\n41262.0 5562.0\n41256.0 38412.0\n4950.0 38418.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.vrt LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.cut.vrt LVVA-001679-0217-003698-PLANSETE-095-a-1_3698.xyz