#!/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 26.89914723014832 57.660335528650016 -gcp 10485.0 0.0 26.89935107803345 57.63429259731352 -gcp 10485.0 13266.0 26.8376673057171 57.63444319315666 -gcp 0.0 13266.0 26.83782327863818 57.66005425418938 Aluksne-1989-1185/Aluksne-1989-1185-15.jpg Aluksne-1989-1185-15.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 1032.0\n9495.0 1026.0\n9495.0 9438.0\n1002.0 9456.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-15.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-15.vrt Aluksne-1989-1185-15.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-15.cut.vrt Aluksne-1989-1185-15.xyz