#!/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 1740.0 942.0 26.337216666666666 57 -gcp 14457.0 912.0 26.837216666666666 57 -gcp 14523.0 12603.0 26.837216666666666 56.75 -gcp 1716.0 12639.0 26.337216666666666 56.75 bruno/T14_1917.jpg T14_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1740.0 942.0\n14457.0 912.0\n14523.0 12603.0\n1716.0 12639.0" | \
  gdaltransform -tps -output_xy T14_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  T14_1917.vrt T14_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES T14_1917.cut.vrt T14_1917.xyz