#!/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 26.992110013962 57.617698278742 -gcp 10485.0 0.0 26.9904255867 57.591274317198 -gcp 10485.0 10584.0 26.941888332367 57.592470334419 -gcp 0.0 10584.0 26.942789554596 57.618496963882 Aluksne-1989-1185/Aluksne-1989-1185-45.jpg Aluksne-1989-1185-45.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1038.0 1068.0\n9447.0 1062.0\n9423.0 9564.0\n1005.0 9546.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-45.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-45.vrt Aluksne-1989-1185-45.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-45.cut.vrt Aluksne-1989-1185-45.xyz