#!/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 2262.0 780.0 20.837216666666666 56.25 -gcp 16830.0 789.0 21.337216666666666 56.25 -gcp 16863.0 13914.0 21.337216666666666 56 -gcp 2193.0 13932.0 20.837216666666666 56 bruno/H17_1921_Dorbiany.jpg H17_1921_Dorbiany.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2262.0 780.0\n16830.0 789.0\n16863.0 13914.0\n2193.0 13932.0" | \
  gdaltransform -tps -output_xy H17_1921_Dorbiany.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  H17_1921_Dorbiany.vrt H17_1921_Dorbiany.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES H17_1921_Dorbiany.cut.vrt H17_1921_Dorbiany.xyz