#!/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 2034.0 2052.0 20.46375 57.5319 -gcp 29598.0 2094.0 21.6816 57.61686666666667 -gcp 29517.0 21786.0 21.789666666666665 57.15136666666667 -gcp 1935.0 21750.0 20.58735 57.066583333333334 1915_3verst_de_126k/uw/Reihe_VII_Blatt_1_Windau_1915_uw.jpg Reihe_VII_Blatt_1_Windau_1915_uw.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2034.0 2052.0\n29598.0 2094.0\n29517.0 21786.0\n15723.0 21757.494169905607\n1935.0 21750.0" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_1_Windau_1915_uw.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_1_Windau_1915_uw.vrt Reihe_VII_Blatt_1_Windau_1915_uw.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VII_Blatt_1_Windau_1915_uw.cut.vrt Reihe_VII_Blatt_1_Windau_1915_uw.xyz