#!/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 2127.0 1113.0 21.337216666666666 56.75 -gcp 14475.0 1113.0 21.837216666666666 56.75 -gcp 14535.0 12342.0 21.837216666666666 56.5 -gcp 2094.0 12357.0 21.337216666666666 56.5 bruno/J15_1919.jpg J15_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2127.0 1113.0\n14475.0 1113.0\n14535.0 12342.0\n2094.0 12357.0" | \
  gdaltransform -tps -output_xy J15_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  J15_1919.vrt J15_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES J15_1919.cut.vrt J15_1919.xyz