#!/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 26.52040544223786 57.464966809621835 -gcp 10539.0 0.0 26.52115646076203 57.43791833260441 -gcp 10539.0 10599.0 26.470919816970824 57.43761232155846 -gcp 0.0 10599.0 26.47085544395447 57.46464653089961 Aluksne-1989-1186/Aluksne-1989-1186-228.jpg Aluksne-1989-1186-228.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1095.0 912.0\n9513.0 1014.0\n9402.0 9510.0\n981.0 9417.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-228.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-228.vrt Aluksne-1989-1186-228.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-228.cut.vrt Aluksne-1989-1186-228.xyz