#!/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 2169.0 2028.0 23.004 57.22128333333333 -gcp 29565.0 1986.0 24.215583333333335 57.2808 -gcp 29598.0 21861.0 24.295066666666667 56.80938333333334 -gcp 2100.0 21798.0 23.093783333333334 56.74915 1915_3verst_de_126k/greif/Reihe_VIII_Blatt_3_Riga_1914_greif.jpg Reihe_VIII_Blatt_3_Riga_1914_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2122.5 11917.502498611882\n2169.0 2028.0\n15861.0 2049.023320377568\n29565.0 1986.0\n29598.0 21861.0\n15840.0 21817.49333703498\n2100.0 21798.0" | \
  gdaltransform -tps -output_xy Reihe_VIII_Blatt_3_Riga_1914_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VIII_Blatt_3_Riga_1914_greif.vrt Reihe_VIII_Blatt_3_Riga_1914_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VIII_Blatt_3_Riga_1914_greif.cut.vrt Reihe_VIII_Blatt_3_Riga_1914_greif.xyz