#!/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 26.77318811416626 57.58012589509062 -gcp 10497.0 0.0 26.774368286132816 57.55351057226259 -gcp 10497.0 10590.0 26.724908351898197 57.55336953478754 -gcp 0.0 10590.0 26.72431826591492 57.57962257725354 Aluksne-1989-1185/Aluksne-1989-1185-147.jpg Aluksne-1989-1185-147.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 975.0\n942.0 9480.0\n9381.0 9513.0\n9438.0 1032.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-147.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-147.vrt Aluksne-1989-1185-147.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-147.cut.vrt Aluksne-1989-1185-147.xyz