#!/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 26.521505147933965 57.453723635720245 -gcp 10722.0 0.0 26.520603925704958 57.42606863963846 -gcp 10722.0 10746.0 26.46951970386505 57.42673571989102 -gcp 0.0 10746.0 26.47126313972473 57.454248932836435 Aluksne-1989-1186/Aluksne-1989-1186-229.jpg Aluksne-1989-1186-229.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1017.0 1071.0\n9438.0 873.0\n9609.0 9408.0\n1182.0 9576.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-229.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-229.vrt Aluksne-1989-1186-229.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-229.cut.vrt Aluksne-1989-1186-229.xyz