#!/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 0.0 0.0 21.048533712753215 57.620103274208226 -gcp 16200.0 0.0 21.765751079071553 57.66964575577615 -gcp 16200.0 25479.0 21.904357264044656 57.06543502438951 -gcp 0.0 25479.0 21.200018855974104 57.015815101033034 1915_3verst_de_126k/greif/Reihe_VII_Blatt_1_Windau_1914_greif.jpg Reihe_VII_Blatt_1_Windau_1914_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2076.0 1899.0\n2073.0 21566.998334258744\n14052.75 21544.50249861188\n14055.0 1928.2512493059412" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_1_Windau_1914_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_1_Windau_1914_greif.vrt Reihe_VII_Blatt_1_Windau_1914_greif.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_1914_greif.cut.vrt Reihe_VII_Blatt_1_Windau_1914_greif.xyz