#!/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 26.926514272689822 57.592014427305585 -gcp 10485.0 0.0 26.926895146369933 57.56690038122296 -gcp 10485.0 13260.0 26.869416876800155 57.56594616123131 -gcp 0.0 13260.0 26.86587287248191 57.59081548881805 Aluksne-1989-1185/Aluksne-1989-1185-27.jpg Aluksne-1989-1185-27.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1053.0 1050.0\n9558.0 1095.0\n9495.0 9507.0\n984.0 9468.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-27.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-27.vrt Aluksne-1989-1185-27.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-27.cut.vrt Aluksne-1989-1185-27.xyz