#!/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 27.024274809653523 57.4478340258672 -gcp 10506.0 0.0 27.02571429163678 57.42138814084771 -gcp 10506.0 10614.0 26.976754604338733 57.42083134388158 -gcp 0.0 10614.0 26.97571208928968 57.44690482177707 Aluksne-1989-1186/Aluksne-1989-1186-37.jpg Aluksne-1989-1186-37.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1026.0\n9447.0 996.0\n9447.0 9495.0\n1020.0 9514.5" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-37.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-37.vrt Aluksne-1989-1186-37.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-37.cut.vrt Aluksne-1989-1186-37.xyz