#!/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 26.85087232799114 57.51274859899791 -gcp 10587.0 0.0 26.899191725428274 57.512653995392775 -gcp 10587.0 10683.0 26.89886454067634 57.48642689743424 -gcp 0.0 10683.0 26.850357388608263 57.486645442461956 Aluksne-1989-1185/Aluksne-1989-1185-2.jpg Aluksne-1989-1185-2.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1050.0 1104.0\n9450.0 1023.0\n9522.0 9495.0\n1134.0 9588.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-2.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-2.vrt Aluksne-1989-1185-2.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-2.cut.vrt Aluksne-1989-1185-2.xyz