#!/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 26.96033120155335 57.60237621494444 -gcp 10494.0 0.0 26.95956463950275 57.5761456460752 -gcp 10494.0 10479.0 26.910924911499027 57.57668894411363 -gcp 0.0 10479.0 26.911407709121708 57.602749860464016 Aluksne-1989-1185/Aluksne-1989-1185-61.jpg Aluksne-1989-1185-61.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 966.0\n9420.0 993.0\n9390.0 9426.0\n930.0 9399.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-61.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-61.vrt Aluksne-1989-1185-61.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-61.cut.vrt Aluksne-1989-1185-61.xyz