#!/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 26.74236718093615 57.53850291615763 -gcp 10485.0 0.0 26.742260184155487 57.51199011140355 -gcp 10485.0 13350.0 26.680493701496946 57.51192407296758 -gcp 0.0 13350.0 26.679226985336456 57.538065249271014 Aluksne-1989-1185/Aluksne-1989-1185-156.jpg Aluksne-1989-1185-156.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1077.0 1050.0\n1023.0 9513.0\n9558.0 9531.0\n9588.0 1071.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-156.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-156.vrt Aluksne-1989-1185-156.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-156.cut.vrt Aluksne-1989-1185-156.xyz