#!/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 26.957915045232017 57.473495149907556 -gcp 10503.0 0.0 26.95747994417438 57.44752059161781 -gcp 10503.0 10509.0 26.908590016586537 57.44709040153927 -gcp 0.0 10509.0 26.908236548193788 57.473875439129344 Aluksne-1989-1186/Aluksne-1989-1186-54.jpg Aluksne-1989-1186-54.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1011.0 948.0\n9489.0 981.0\n9426.0 9399.0\n966.0 9369.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-54.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-54.vrt Aluksne-1989-1186-54.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-54.cut.vrt Aluksne-1989-1186-54.xyz