#!/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 26.72045043068515 57.48236048360885 -gcp 11928.0 0.0 26.709272542703644 57.45274051900344 -gcp 11928.0 12102.0 26.65441573751581 57.458850784789526 -gcp 0.0 12102.0 26.665346862266954 57.48834063739107 Aluksne-1989-1186/Aluksne-1989-1186-163.jpg Aluksne-1989-1186-163.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 2580.0\n9390.0 1188.0\n10764.0 9612.0\n2454.0 10983.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-163.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-163.vrt Aluksne-1989-1186-163.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-163.cut.vrt Aluksne-1989-1186-163.xyz