#!/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 1566.0 1221.0 26.333333333333332 54 -gcp 17022.0 1377.0 28.333333333333332 54 -gcp 17106.0 14520.0 28.333333333333332 53 -gcp 1308.0 14325.0 26.333333333333332 53 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.jpg 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1566.0 1221.0\n17022.0 1377.0\n17106.0 14520.0\n1308.0 14325.0" | \
  gdaltransform -tps -output_xy 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.vrt 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.cut.vrt 1943_Osteuropa_300K_U54_Minsk_Ausg.3_mapwig.xyz