#!/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 1368.0 1116.0 20.837216666666666 56.25 -gcp 16008.0 1143.0 21.337216666666666 56.25 -gcp 16044.0 14307.0 21.337216666666666 56 -gcp 1287.0 14277.0 20.837216666666666 56 other/KdwR_H17_Dorbiany_1918_400dpi.jpg KdwR_H17_Dorbiany_1918_400dpi.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1368.0 1116.0\n16008.0 1143.0\n16044.0 14307.0\n1287.0 14277.0" | \
  gdaltransform -tps -output_xy KdwR_H17_Dorbiany_1918_400dpi.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR_H17_Dorbiany_1918_400dpi.vrt KdwR_H17_Dorbiany_1918_400dpi.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR_H17_Dorbiany_1918_400dpi.cut.vrt KdwR_H17_Dorbiany_1918_400dpi.xyz