#!/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 2112.0 1221.0 21.337216666666666 57 -gcp 14304.0 1200.0 21.837216666666666 57 -gcp 14379.0 12288.0 21.837216666666666 56.75 -gcp 2085.0 12306.0 21.337216666666666 56.75 bruno/J14_1919.jpg J14_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2112.0 1221.0\n14304.0 1200.0\n14379.0 12288.0\n2085.0 12306.0" | \
  gdaltransform -tps -output_xy J14_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  J14_1919.vrt J14_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES J14_1919.cut.vrt J14_1919.xyz