#!/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 0.0 0.0 26.52020917701721 57.497983733309155 -gcp 10527.0 0.0 26.520391567230227 57.47077940477292 -gcp 10527.0 10491.0 26.470590369224553 57.47064384284694 -gcp 0.0 10491.0 26.470606462478642 57.497632033094604 Aluksne-1989-1186/Aluksne-1989-1186-223.jpg Aluksne-1989-1186-223.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1029.0 891.0\n9447.0 843.0\n9465.0 9351.0\n1053.0 9375.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-223.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-223.vrt Aluksne-1989-1186-223.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-223.cut.vrt Aluksne-1989-1186-223.xyz