#!/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 26.988290389690196 57.38713934383131 -gcp 10956.0 0.0 26.990701314791988 57.3609372989819 -gcp 10956.0 11028.0 26.941769679151506 57.359518465188785 -gcp 0.0 11028.0 26.93982009400027 57.38608493694902 Aluksne-1989-1186/Aluksne-1989-1186-16.jpg Aluksne-1989-1186-16.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1494.0 1035.0\n9906.0 1479.0\n9423.0 9999.0\n999.0 9525.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-16.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-16.vrt Aluksne-1989-1186-16.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-16.cut.vrt Aluksne-1989-1186-16.xyz