#!/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 1182.0 801.0 21 58 -gcp 11640.0 792.0 22 58 -gcp 11775.0 13920.0 22 57.333333333333336 -gcp 1113.0 13923.0 21 57.333333333333336 lnb/24556815.jpg 24556815.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1182.0 801.0\n6414.0 804.0041689827683\n11640.0 792.0\n11775.0 13920.0\n6432.0 13931.255419677598\n1113.0 13923.0" | \
  gdaltransform -tps -output_xy 24556815.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  24556815.vrt 24556815.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 24556815.cut.vrt 24556815.xyz