#!/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 2652.0 3354.0 25.490083333333335 56.85845 -gcp 43800.0 2832.0 26.69558333333333 56.89803333333333 -gcp 44127.0 32154.0 26.743133333333333 56.423116666666665 -gcp 3045.0 32715.0 25.549733333333332 56.38473333333334 1915_3verst_de_126k/loc/Reihe_IX_Blatt_5_Jacobstadt_1910_loc.jpg Reihe_IX_Blatt_5_Jacobstadt_1910_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2652.0 3354.0\n23206.5 3062.9833425874513\n43800.0 2832.0\n43956.0 17493.0\n44127.0 32154.0\n23574.375 32461.50333148251\n3045.0 32715.0" | \
  gdaltransform -tps -output_xy Reihe_IX_Blatt_5_Jacobstadt_1910_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_IX_Blatt_5_Jacobstadt_1910_loc.vrt Reihe_IX_Blatt_5_Jacobstadt_1910_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_IX_Blatt_5_Jacobstadt_1910_loc.cut.vrt Reihe_IX_Blatt_5_Jacobstadt_1910_loc.xyz