#!/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 26.95978403091431 57.52812863566572 -gcp 10485.0 0.0 26.95900082588196 57.50193932472165 -gcp 10485.0 13266.0 26.896913051605228 57.50235435146776 -gcp 0.0 13266.0 26.89736366271973 57.52867008634882 Aluksne-1989-1185/Aluksne-1989-1185-68.jpg Aluksne-1989-1185-68.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "996.0 963.0\n984.0 9402.0\n9447.0 9405.0\n9483.0 969.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-68.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-68.vrt Aluksne-1989-1185-68.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-68.cut.vrt Aluksne-1989-1185-68.xyz