#!/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 4767.0 2496.0 26.837216666666666 57 -gcp 26250.0 2697.0 27.337216666666666 57 -gcp 26196.0 22401.0 27.337216666666666 56.75 -gcp 4590.0 22203.0 26.837216666666666 56.75 bruno/U14_1919.jpg U14_1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4767.0 2496.0\n26250.0 2697.0\n26196.0 22401.0\n4590.0 22203.0" | \
  gdaltransform -tps -output_xy U14_1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  U14_1919.vrt U14_1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES U14_1919.cut.vrt U14_1919.xyz