#!/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 26.99074745178223 57.694217491069104 -gcp 10485.0 0.0 26.99276447296143 57.668417254482364 -gcp 10485.0 13266.0 26.930665969848636 57.66670729710025 -gcp 0.0 13266.0 26.92948579788208 57.6934319390787 Aluksne-1989-1185/Aluksne-1989-1185-52.jpg Aluksne-1989-1185-52.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1068.0 1041.0\n9507.0 1050.0\n9483.0 9558.0\n1044.0 9561.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-52.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-52.vrt Aluksne-1989-1185-52.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-52.cut.vrt Aluksne-1989-1185-52.xyz