#!/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 2262.0 1134.0 22.837216666666666 57.5 -gcp 14376.0 1140.0 23.337216666666666 57.5 -gcp 14358.0 12405.0 23.337216666666666 57.25 -gcp 2193.0 12393.0 22.837216666666666 57.25 bruno/M12_1919.jpg M12_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2262.0 1134.0\n14376.0 1140.0\n14358.0 12405.0\n2193.0 12393.0" | \
  gdaltransform -tps -output_xy M12_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  M12_1919.vrt M12_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES M12_1919.cut.vrt M12_1919.xyz