#!/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 26.95953726768494 57.690209277477635 -gcp 10485.0 0.0 26.95901155471802 57.663792150322465 -gcp 10485.0 13266.0 26.896312236785892 57.66397578853039 -gcp 0.0 13266.0 26.896923780441288 57.69092608642857 Aluksne-1989-1185/Aluksne-1989-1185-53.jpg Aluksne-1989-1185-53.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1026.0 960.0\n9462.0 1002.0\n9396.0 9522.0\n969.0 9477.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-53.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-53.vrt Aluksne-1989-1185-53.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-53.cut.vrt Aluksne-1989-1185-53.xyz