#!/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 26.74528552754797 57.43135984687526 -gcp 11364.0 0.0 26.740408033124403 57.40286926009289 -gcp 11364.0 11469.0 26.686514380053005 57.40542481560072 -gcp 0.0 11469.0 26.69147770516495 57.433892570837024 Aluksne-1989-1186/Aluksne-1989-1186-153.jpg Aluksne-1989-1186-153.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1143.0 1947.0\n9612.0 1176.0\n10341.0 9570.0\n1896.0 10329.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-153.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-153.vrt Aluksne-1989-1186-153.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-153.cut.vrt Aluksne-1989-1186-153.xyz