#!/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 3696.0 3747.0 21 56 -gcp 30129.0 4029.0 24 56 -gcp 30651.0 35595.0 24 54 -gcp 2805.0 35280.0 21 54 N-34-B_KAUNAS_(KOVNO)_IX.1944.jpg N-34-B_KAUNAS_(KOVNO)_IX.1944.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3696.0 3747.0\n30129.0 4029.0\n30651.0 35595.0\n2805.0 35280.0" | \
  gdaltransform -tps -output_xy N-34-B_KAUNAS_(KOVNO)_IX.1944.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  N-34-B_KAUNAS_(KOVNO)_IX.1944.vrt N-34-B_KAUNAS_(KOVNO)_IX.1944.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES N-34-B_KAUNAS_(KOVNO)_IX.1944.cut.vrt N-34-B_KAUNAS_(KOVNO)_IX.1944.xyz