#!/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 2301.0 1179.0 22.837216666666666 57.25 -gcp 14208.0 1149.0 23.337216666666666 57.25 -gcp 14283.0 12063.0 23.337216666666666 57 -gcp 2292.0 12099.0 22.837216666666666 57 bruno/M13_1919.jpg M13_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2301.0 1179.0\n14208.0 1149.0\n14283.0 12063.0\n2292.0 12099.0" | \
  gdaltransform -tps -output_xy M13_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  M13_1919.vrt M13_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES M13_1919.cut.vrt M13_1919.xyz