#!/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 26.96029901504517 57.62449516024916 -gcp 10485.0 0.0 26.96006298065186 57.597909416574176 -gcp 10485.0 13260.0 26.896977424621586 57.597851925245095 -gcp 0.0 13260.0 26.897063255310062 57.62441473121647 Aluksne-1989-1185/Aluksne-1989-1185-59.jpg Aluksne-1989-1185-59.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "978.0 996.0\n9459.0 945.0\n9480.0 9390.0\n996.0 9423.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-59.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-59.vrt Aluksne-1989-1185-59.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-59.cut.vrt Aluksne-1989-1185-59.xyz