#!/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 26.71186208724976 57.59038302879159 -gcp 10521.0 0.0 26.71107888221741 57.563824119152265 -gcp 10521.0 10584.0 26.66088938713074 57.5641751429498 -gcp 0.0 10584.0 26.662015914916996 57.5907222959852 Aluksne-1989-1185/Aluksne-1989-1185-166.jpg Aluksne-1989-1185-166.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1029.0 984.0\n912.0 9438.0\n9441.0 9555.0\n9573.0 1101.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-166.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-166.vrt Aluksne-1989-1185-166.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-166.cut.vrt Aluksne-1989-1185-166.xyz