#!/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 27.023487721189586 57.57825872681635 -gcp 10485.0 0.0 27.0225795584008 57.552061556408766 -gcp 10485.0 10572.0 26.974145226068874 57.55272696820772 -gcp 0.0 10572.0 26.974860606835485 57.57873407377051 Aluksne-1989-1185/Aluksne-1989-1185-95.jpg Aluksne-1989-1185-95.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "990.0 1014.0\n972.0 9519.0\n9405.0 9522.0\n9423.0 1014.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-95.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-95.vrt Aluksne-1989-1185-95.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-95.cut.vrt Aluksne-1989-1185-95.xyz