#!/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 26.958112911438228 57.408915582440656 -gcp 10506.0 0.0 26.9565924447028 57.38312138460606 -gcp 10506.0 10536.0 26.90800263151565 57.383695047920305 -gcp 0.0 10536.0 26.909844963332866 57.40982454092125 Aluksne-1989-1186/Aluksne-1989-1186-60.jpg Aluksne-1989-1186-60.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "994.5 985.5\n9447.0 922.875\n9477.0 9333.0\n1039.5 9405.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-60.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-60.vrt Aluksne-1989-1186-60.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-60.cut.vrt Aluksne-1989-1186-60.xyz