#!/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 26.86390042304993 57.588979924081706 -gcp 10485.0 0.0 26.86406135559082 57.563455828251534 -gcp 10485.0 13260.0 26.804142806100142 57.56330352754262 -gcp 0.0 13260.0 26.803806004095893 57.58916507104946 Aluksne-1989-1185/Aluksne-1989-1185-77.jpg Aluksne-1989-1185-77.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1062.0 1002.0\n1038.0 9513.0\n9468.0 9531.0\n9495.0 1017.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-77.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-77.vrt Aluksne-1989-1185-77.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-77.cut.vrt Aluksne-1989-1185-77.xyz