#!/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 1923.0 3258.0 26.607166666666668 57.84356666666667 -gcp 44031.0 3264.0 27.84665 57.871916666666664 -gcp 43854.0 32979.0 27.87815 57.39706666666667 -gcp 1869.0 32931.0 26.647333333333332 57.37153333333333 1915_3verst_de_126k/loc/Reihe_VII_Blatt_6_Pjetschory_1915_loc.jpg Reihe_VII_Blatt_6_Pjetschory_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1818.0 25923.22320932815\n1830.0 18111.008328706273\n1923.0 3258.0\n22974.0 3267.00333148251\n44031.0 3264.0\n43950.0 18129.004164353137\n43854.0 32979.0\n33342.0 32909.98667406996\n22857.0 32888.963353692394\n12279.0 32881.484175458085\n1869.0 32931.0" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_6_Pjetschory_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_6_Pjetschory_1915_loc.vrt Reihe_VII_Blatt_6_Pjetschory_1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VII_Blatt_6_Pjetschory_1915_loc.cut.vrt Reihe_VII_Blatt_6_Pjetschory_1915_loc.xyz