#!/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 2385.0 2520.0 25.6084 55.9133 -gcp 29778.0 2445.0 26.789983333333332 55.94805 -gcp 29826.0 22167.0 26.836 55.47593333333333 -gcp 2397.0 22251.0 25.666816666666666 55.43803333333334 1915_3verst_de_126k/uw/Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.jpg Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2382.0 12387.000832870628\n2385.0 2520.0\n29778.0 2445.0\n29784.0 12313.504164353139\n29826.0 22167.0\n2397.0 22251.0" | \
  gdaltransform -tps -output_xy Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.vrt Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.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_uw.cut.vrt Reihe_XI_Blatt_5_Duenaburg_(Dwinssk)_1915_uw.xyz