#!/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 27.019569908376 57.502097140765 -gcp 10506.0 0.0 27.019547542364 57.475345558619 -gcp 10506.0 10614.0 26.969047395595 57.475818647892 -gcp 0.0 10614.0 26.970625442836 57.502550048336 Aluksne-1989-1186/Aluksne-1989-1186-32.jpg Aluksne-1989-1186-32.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1041.0 1032.0\n9450.0 972.0\n9483.0 9471.0\n1071.0 9525.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-32.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-32.vrt Aluksne-1989-1186-32.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-32.cut.vrt Aluksne-1989-1186-32.xyz