#!/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 5793.0 2490.0 26.337216666666666 57.25 -gcp 27108.0 2352.0 26.837216666666666 57.25 -gcp 27315.0 22053.0 26.837216666666666 57 -gcp 5868.0 22182.0 26.337216666666666 57 nr/KdwR-LC_T13_Alt_Schwanenburg_1919_.jpg KdwR-LC_T13_Alt_Schwanenburg_1919_.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5793.0 2490.0\n27108.0 2352.0\n27315.0 22053.0\n5868.0 22182.0" | \
  gdaltransform -tps -output_xy KdwR-LC_T13_Alt_Schwanenburg_1919_.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_T13_Alt_Schwanenburg_1919_.vrt KdwR-LC_T13_Alt_Schwanenburg_1919_.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_T13_Alt_Schwanenburg_1919_.cut.vrt KdwR-LC_T13_Alt_Schwanenburg_1919_.xyz