#!/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 3060.0 3183.0 25.6084 55.9133 -gcp 43995.0 2877.0 26.789983333333332 55.94805 -gcp 44148.0 32541.0 26.836 55.47593333333333 -gcp 3285.0 32883.0 25.666816666666666 55.43803333333334 1915_3verst_de_126k/loc/Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.jpg Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3060.0 3183.0\n23529.0 3004.4858411993337\n43995.0 2877.0\n44073.0 17751.023320377568\n44148.0 32541.0\n23715.0 32707.497501388116\n3285.0 32883.0" | \
  gdaltransform -tps -output_xy Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.vrt Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.cut.vrt Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_loc.xyz