#!/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 456.0 840.0 26.5 57.5 -gcp 11118.0 819.0 26.75 57.5 -gcp 11166.0 13932.0 26.75 57.333333333333336 -gcp 441.0 13956.0 26.5 57.333333333333336 mapster/RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.jpg RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "456.0 840.0\n11118.0 819.0\n11166.0 13932.0\n441.0 13956.0" | \
  gdaltransform -tps -output_xy RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.vrt RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.cut.vrt RKKA050_O-35-90-C_Mz._Treppenxof_1937_greif.xyz