#!/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 26.89941545104981 57.63824806716158 -gcp 10485.0 0.0 26.89835866069794 57.6121469654405 -gcp 10485.0 13260.0 26.83557480087847 57.61320606879415 -gcp 0.0 13260.0 26.838363727658493 57.639206952742676 Aluksne-1989-1185/Aluksne-1989-1185-13.jpg Aluksne-1989-1185-13.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "975.0 1014.0\n9435.0 1026.0\n9420.0 9441.0\n942.0 9435.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-13.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-13.vrt Aluksne-1989-1185-13.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-13.cut.vrt Aluksne-1989-1185-13.xyz