#!/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 26.927694082260135 57.560428793190006 -gcp 10485.0 0.0 26.928198730437902 57.535145814986414 -gcp 10485.0 13272.0 26.868068575859077 57.53458233266191 -gcp 0.0 13272.0 26.867269277572632 57.56014680398039 Aluksne-1989-1185/Aluksne-1989-1185-30.jpg Aluksne-1989-1185-30.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1074.0\n9507.0 1041.0\n9543.0 9465.0\n1032.0 9501.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-30.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-30.vrt Aluksne-1989-1185-30.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-30.cut.vrt Aluksne-1989-1185-30.xyz