#!/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 1404.0 2106.0 25.368466666666666 57.80485 -gcp 28950.0 2139.0 26.607166666666668 57.84356666666667 -gcp 28941.0 22083.0 26.647333333333332 57.37153333333333 -gcp 1380.0 22125.0 25.429566666666666 57.33153333333333 1915_3verst_de_126k/amwig/Reihe_VII_Blatt_5_Wolmar_1915_amwig.jpg Reihe_VII_Blatt_5_Wolmar_1915_amwig.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1353.0 12122.253747917825\n1404.0 2106.0\n15171.0 2090.982509716824\n28950.0 2139.0\n28959.0 12115.502498611882\n28941.0 22083.0\n15165.0 22113.004997223765\n1380.0 22125.0" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_5_Wolmar_1915_amwig.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_5_Wolmar_1915_amwig.vrt Reihe_VII_Blatt_5_Wolmar_1915_amwig.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VII_Blatt_5_Wolmar_1915_amwig.cut.vrt Reihe_VII_Blatt_5_Wolmar_1915_amwig.xyz