#!/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 2256.0 1128.0 21.337216666666666 57.75 -gcp 14325.0 1134.0 21.837216666666666 57.75 -gcp 14385.0 12432.0 21.837216666666666 57.5 -gcp 2241.0 12432.0 21.337216666666666 57.5 bruno/J11_1918.jpg J11_1918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2256.0 1128.0\n14325.0 1134.0\n14385.0 12432.0\n2241.0 12432.0" | \
  gdaltransform -tps -output_xy J11_1918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  J11_1918.vrt J11_1918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES J11_1918.cut.vrt J11_1918.xyz