#!/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 1791.0 1227.0 24.333333333333332 56 -gcp 16500.0 1227.0 26.333333333333332 56 -gcp 16728.0 14382.0 26.333333333333332 55 -gcp 1662.0 14388.0 24.333333333333332 55 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.jpg 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1791.0 1227.0\n16500.0 1227.0\n16728.0 14382.0\n1662.0 14388.0" | \
  gdaltransform -tps -output_xy 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.vrt 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.cut.vrt 1943_300K_Osteuropa_T56_Wilkomir_Ukmerge_mapywig.xyz