#!/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 26.89935201161631 57.47988618526441 -gcp 10503.0 0.0 26.898246854556184 57.454294970204955 -gcp 10503.0 10587.0 26.84959576801152 57.455211558916766 -gcp 0.0 10587.0 26.85096144676209 57.48098298787507 Aluksne-1989-1186/Aluksne-1989-1186-85.jpg Aluksne-1989-1186-85.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1017.0 987.0\n9543.0 1041.0\n9459.0 9465.0\n975.0 9411.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-85.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-85.vrt Aluksne-1989-1186-85.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-85.cut.vrt Aluksne-1989-1186-85.xyz