#!/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 3501.0 2379.0 25.306583333333332 58.27615 -gcp 30894.0 2370.0 26.553616666666667 58.315983333333335 -gcp 30852.0 22173.0 26.607166666666668 57.84356666666667 -gcp 3453.0 22170.0 25.368466666666666 57.80485 1915_3verst_de_126k/uw/Reihe_VI_Blatt_5_Ringen_1917_uw.jpg Reihe_VI_Blatt_5_Ringen_1917_uw.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3444.0 12289.508328706273\n3501.0 2379.0\n17194.5 2349.7362576346472\n30894.0 2370.0\n30877.5 12275.252082176568\n30852.0 22173.0\n17152.5 22195.513325930042\n3453.0 22170.0" | \
  gdaltransform -tps -output_xy Reihe_VI_Blatt_5_Ringen_1917_uw.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VI_Blatt_5_Ringen_1917_uw.vrt Reihe_VI_Blatt_5_Ringen_1917_uw.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VI_Blatt_5_Ringen_1917_uw.cut.vrt Reihe_VI_Blatt_5_Ringen_1917_uw.xyz