#!/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 26.520499783515934 57.442747330980666 -gcp 10500.0 0.0 26.52059097862244 57.41602395134927 -gcp 10500.0 10554.0 26.470235389709476 57.415596422582524 -gcp 0.0 10554.0 26.470718187332157 57.442816620256735 Aluksne-1989-1186/Aluksne-1989-1186-230.jpg Aluksne-1989-1186-230.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1026.0 933.0\n9447.0 957.0\n9408.0 9420.0\n984.0 9429.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-230.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-230.vrt Aluksne-1989-1186-230.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-230.cut.vrt Aluksne-1989-1186-230.xyz