#!/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 3618.0 1314.0 26.333333333333332 57 -gcp 17958.0 1410.0 28.333333333333332 57 -gcp 18123.0 14511.0 28.333333333333332 56 -gcp 3390.0 14427.0 26.333333333333332 56 1943_300K_Osteuropa_U57_Rositten_mapywig.jpg 1943_300K_Osteuropa_U57_Rositten_mapywig.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3618.0 1314.0\n17958.0 1410.0\n18123.0 14511.0\n3390.0 14427.0" | \
  gdaltransform -tps -output_xy 1943_300K_Osteuropa_U57_Rositten_mapywig.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1943_300K_Osteuropa_U57_Rositten_mapywig.vrt 1943_300K_Osteuropa_U57_Rositten_mapywig.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1943_300K_Osteuropa_U57_Rositten_mapywig.cut.vrt 1943_300K_Osteuropa_U57_Rositten_mapywig.xyz