#!/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 26.92433539104462 57.68832599758463 -gcp 10485.0 0.0 26.928326518058782 57.66262562135464 -gcp 10485.0 13266.0 26.867363599301324 57.660275356762696 -gcp 0.0 13266.0 26.864237651302403 57.68546597209053 Aluksne-1989-1185/Aluksne-1989-1185-18.jpg Aluksne-1989-1185-18.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1053.0 1080.0\n9558.0 1092.0\n9522.0 9516.0\n1014.0 9507.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-18.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-18.vrt Aluksne-1989-1185-18.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-18.cut.vrt Aluksne-1989-1185-18.xyz