#!/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 4134.0 3213.0 21.337216666666666 56.75 -gcp 25725.0 3288.0 21.837216666666666 56.75 -gcp 25815.0 22926.0 21.837216666666666 56.5 -gcp 4071.0 22881.0 21.337216666666666 56.5 nr/KdwR-LC_J15_Hasenpot_1918_.jpg KdwR-LC_J15_Hasenpot_1918_.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4134.0 3213.0\n25725.0 3288.0\n25815.0 22926.0\n4071.0 22881.0" | \
  gdaltransform -tps -output_xy KdwR-LC_J15_Hasenpot_1918_.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_J15_Hasenpot_1918_.vrt KdwR-LC_J15_Hasenpot_1918_.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_J15_Hasenpot_1918_.cut.vrt KdwR-LC_J15_Hasenpot_1918_.xyz