#!/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 26.95881843566895 57.5810605685473 -gcp 10485.0 0.0 26.958153247833256 57.55523736866156 -gcp 10485.0 13260.0 26.89663410186768 57.555628765936724 -gcp 0.0 13260.0 26.89787864685059 57.58175077703081 Aluksne-1989-1185/Aluksne-1989-1185-63.jpg Aluksne-1989-1185-63.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1017.0 969.0\n963.0 9402.0\n9429.0 9447.0\n9489.0 1017.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-63.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-63.vrt Aluksne-1989-1185-63.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-63.cut.vrt Aluksne-1989-1185-63.xyz