#!/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 852.0 948.0 27.626666666666665 56.25 -gcp 11904.0 963.0 28.076666666666668 56.25 -gcp 11928.0 12045.0 28.076666666666668 56 -gcp 807.0 12036.0 27.626666666666665 56 bruno/VII-24_1917.jpg VII-24_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "852.0 948.0\n11904.0 963.0\n11928.0 12045.0\n807.0 12036.0" | \
  gdaltransform -tps -output_xy VII-24_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VII-24_1917.vrt VII-24_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VII-24_1917.cut.vrt VII-24_1917.xyz