#!/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 4014.0 2550.0 26.837216666666666 56 -gcp 26061.0 2112.0 27.337216666666666 56 -gcp 26613.0 21768.0 27.337216666666666 55.75 -gcp 4377.0 22242.0 26.837216666666666 55.75 nr/KdwR-LC_U18_Kraslawka_1917_.jpg KdwR-LC_U18_Kraslawka_1917_.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4014.0 2550.0\n26061.0 2112.0\n26613.0 21768.0\n4377.0 22242.0" | \
  gdaltransform -tps -output_xy KdwR-LC_U18_Kraslawka_1917_.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_U18_Kraslawka_1917_.vrt KdwR-LC_U18_Kraslawka_1917_.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_U18_Kraslawka_1917_.cut.vrt KdwR-LC_U18_Kraslawka_1917_.xyz