#!/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 26.712763309478763 57.52799039164959 -gcp 11076.0 0.0 26.715788841247562 57.50019846667987 -gcp 11076.0 11025.0 26.664075851440433 57.49871694262068 -gcp 0.0 11025.0 26.661136150360107 57.52626229722279 Aluksne-1989-1185/Aluksne-1989-1185-172.jpg Aluksne-1989-1185-172.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1566.0 1038.0\n999.0 9477.0\n9516.0 10047.0\n10104.0 1608.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-172.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-172.vrt Aluksne-1989-1185-172.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-172.cut.vrt Aluksne-1989-1185-172.xyz