#!/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 1626.0 1254.0 21.833333333333332 59 -gcp 18609.0 1329.0 24.333333333333332 59 -gcp 18831.0 14430.0 24.333333333333332 58 -gcp 1374.0 14337.0 21.833333333333332 58 1943_300K_Osteuropa_S59_Hapsal_mapywig.jpg 1943_300K_Osteuropa_S59_Hapsal_mapywig.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1626.0 1254.0\n18609.0 1329.0\n18831.0 14430.0\n1374.0 14337.0" | \
  gdaltransform -tps -output_xy 1943_300K_Osteuropa_S59_Hapsal_mapywig.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1943_300K_Osteuropa_S59_Hapsal_mapywig.vrt 1943_300K_Osteuropa_S59_Hapsal_mapywig.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1943_300K_Osteuropa_S59_Hapsal_mapywig.cut.vrt 1943_300K_Osteuropa_S59_Hapsal_mapywig.xyz