#!/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 1362.0 1980.0 24 58 -gcp 17109.0 1827.0 24.75 58 -gcp 17265.0 21837.0 24.75 57.5 -gcp 1389.0 21915.0 24 57.5 lnb/24798677.jpg 24798677.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1362.0 1980.0\n17109.0 1827.0\n17265.0 21837.0\n1389.0 21915.0" | \
  gdaltransform -tps -output_xy 24798677.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24798677.vrt 24798677.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24798677.cut.vrt 24798677.xyz