#!/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 27.018591068296324 57.386488477183434 -gcp 10503.0 0.0 27.019788553711695 57.361120228876565 -gcp 10503.0 10593.0 26.972953841250263 57.3601223693466 -gcp 0.0 10593.0 26.971724169326617 57.38564127713369 Aluksne-1989-1186/Aluksne-1989-1186-27.jpg Aluksne-1989-1186-27.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1044.0 1020.0\n9474.0 1044.0\n9402.0 9555.0\n975.0 9516.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-27.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-27.vrt Aluksne-1989-1186-27.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-27.cut.vrt Aluksne-1989-1186-27.xyz