#!/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 4866.0 6378.0 23.95825333333333 56.45764 -gcp 41004.0 6534.0 23.999913333333332 56.45764 -gcp 40980.0 40290.0 23.999913333333332 56.43681 -gcp 4812.0 40092.0 23.95825333333333 56.43681 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.JPG LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4866.0 6378.0\n41004.0 6534.0\n40980.0 40290.0\n4812.0 40092.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.vrt LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.cut.vrt LVVA-001679-0217-002548-PLANSETE-034-c-12_2548.xyz