#!/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 26.647235817634 57.47089569662 -gcp 11967.0 0.0 26.655012281612 57.441285759108 -gcp 11967.0 11685.0 26.601912089017 57.436754508436 -gcp 0.0 11685.0 26.593293411408 57.466702120078 Aluksne-1989-1186/Aluksne-1989-1186-5.jpg Aluksne-1989-1186-5.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2652.0 990.0\n10953.0 2412.0\n9477.0 10791.0\n1183.5 9354.75" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-5.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-5.vrt Aluksne-1989-1186-5.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-5.cut.vrt Aluksne-1989-1186-5.xyz