#!/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 26.67683243751526 57.53000063844428 -gcp 10482.0 0.0 26.677004098892212 57.50331696478087 -gcp 10482.0 10581.0 26.6278874874115 57.5030172316209 -gcp 0.0 10581.0 26.627190113067627 57.52954560661095 Aluksne-1989-1185/Aluksne-1989-1185-175.jpg Aluksne-1989-1185-175.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1044.0 963.0\n969.0 9483.0\n9408.0 9546.0\n9486.0 1020.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-175.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-175.vrt Aluksne-1989-1185-175.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-175.cut.vrt Aluksne-1989-1185-175.xyz