#!/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 26.771720844268803 57.41046456966515 -gcp 10506.0 0.0 26.771020889282013 57.38404832078101 -gcp 10506.0 10626.0 26.721829175948987 57.384140847059015 -gcp 0.0 10626.0 26.722475689888 57.410767980855766 Aluksne-1989-1186/Aluksne-1989-1186-146.jpg Aluksne-1989-1186-146.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1038.0 999.0\n9462.0 1005.0\n9444.0 9507.0\n1029.0 9513.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-146.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-146.vrt Aluksne-1989-1186-146.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-146.cut.vrt Aluksne-1989-1186-146.xyz