#!/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 26.99276447296143 57.683883540642505 -gcp 10485.0 0.0 26.993794441223148 57.65769139016613 -gcp 10485.0 13260.0 26.9330370426178 57.65652047783183 -gcp 0.0 13260.0 26.93133115768433 57.68274788802692 Aluksne-1989-1185/Aluksne-1989-1185-51.jpg Aluksne-1989-1185-51.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 1041.0\n9504.0 1074.0\n9444.0 9594.0\n1008.0 9558.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-51.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-51.vrt Aluksne-1989-1185-51.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-51.cut.vrt Aluksne-1989-1185-51.xyz