#!/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 26.77221979823095 57.664769003125194 -gcp 10608.0 0.0 26.771862372907638 57.63838470326426 -gcp 10608.0 10731.0 26.72196294136345 57.638284449719634 -gcp 0.0 10731.0 26.722449359715068 57.66522559330053 Aluksne-1989-1185/Aluksne-1989-1185-139.jpg Aluksne-1989-1185-139.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1014.0 1089.0\n1065.0 9621.0\n9507.0 9564.0\n9462.0 1023.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-139.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-139.vrt Aluksne-1989-1185-139.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-139.cut.vrt Aluksne-1989-1185-139.xyz