#!/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 4824.0 2493.0 26.337216666666666 57.25 -gcp 26133.0 2355.0 26.837216666666666 57.25 -gcp 26337.0 22053.0 26.837216666666666 57 -gcp 4902.0 22188.0 26.337216666666666 57 bruno/T13_1919.jpg T13_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4824.0 2493.0\n26133.0 2355.0\n26337.0 22053.0\n4902.0 22188.0" | \
  gdaltransform -tps -output_xy T13_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  T13_1919.vrt T13_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES T13_1919.cut.vrt T13_1919.xyz