#!/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 4980.0 2463.0 24.837216666666666 57.75 -gcp 25797.0 2358.0 25.337216666666666 57.75 -gcp 26034.0 21939.0 25.337216666666666 57.5 -gcp 5121.0 22065.0 24.837216666666666 57.5 nr/KdwR-LC_Q11_Dickeln_1918_.jpg KdwR-LC_Q11_Dickeln_1918_.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4980.0 2463.0\n25797.0 2358.0\n26034.0 21939.0\n5121.0 22065.0" | \
  gdaltransform -tps -output_xy KdwR-LC_Q11_Dickeln_1918_.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_Q11_Dickeln_1918_.vrt KdwR-LC_Q11_Dickeln_1918_.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_Q11_Dickeln_1918_.cut.vrt KdwR-LC_Q11_Dickeln_1918_.xyz