#!/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 3096.0 3567.0 24.75 56.5 -gcp 19398.0 3483.0 25.5 56.5 -gcp 19767.0 23184.0 25.5 56 -gcp 3228.0 23304.0 24.75 56 lnb/24798681.jpg 24798681.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3096.0 3567.0\n19398.0 3483.0\n19767.0 23184.0\n3228.0 23304.0" | \
  gdaltransform -tps -output_xy 24798681.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24798681.vrt 24798681.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24798681.cut.vrt 24798681.xyz