#!/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 1776.0 2268.0 20.333333333333332 55 -gcp 21954.0 2178.0 22.333333333333332 55 -gcp 22233.0 19680.0 22.333333333333332 54 -gcp 1608.0 19800.0 20.333333333333332 54 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.jpg 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1776.0 2268.0\n21954.0 2178.0\n22233.0 19680.0\n1608.0 19800.0" | \
  gdaltransform -tps -output_xy 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.vrt 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.cut.vrt 1944_Osteuropa_1_300_000_R55_Koenigsberg_mapywig_COMP65.xyz