#!/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 26.77121334404181 57.64746319273677 -gcp 11631.0 0.0 26.778297796577345 57.61799759562082 -gcp 11631.0 11610.0 26.72501110216725 57.61442828777065 -gcp 0.0 11610.0 26.71772305527411 57.6430433303182 Aluksne-1989-1185/Aluksne-1989-1185-141.jpg Aluksne-1989-1185-141.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2181.0 867.0\n1044.0 9315.0\n9417.0 10425.0\n10548.0 1953.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-141.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-141.vrt Aluksne-1989-1185-141.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-141.cut.vrt Aluksne-1989-1185-141.xyz