#!/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 654.0 573.0 24 56 -gcp 13923.0 708.0 27 56 -gcp 14079.0 16428.0 27 54 -gcp 147.0 16263.0 24 54 N-35-A_VILNO_1938.jpg N-35-A_VILNO_1938.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "654.0 573.0\n13923.0 708.0\n14079.0 16428.0\n147.0 16263.0" | \
  gdaltransform -tps -output_xy N-35-A_VILNO_1938.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  N-35-A_VILNO_1938.vrt N-35-A_VILNO_1938.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES N-35-A_VILNO_1938.cut.vrt N-35-A_VILNO_1938.xyz