#!/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 26.992657184601 57.639446111555 -gcp 10485.0 0.0 26.991745233536 57.612928786244 -gcp 10485.0 10572.0 26.9420170784 57.61345173706 -gcp 0.0 10572.0 26.943562030792 57.640020372597 Aluksne-1989-1185/Aluksne-1989-1185-47.jpg Aluksne-1989-1185-47.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1104.0 1047.0\n9477.0 1038.0\n9459.0 9522.0\n1050.0 9501.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-47.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-47.vrt Aluksne-1989-1185-47.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-47.cut.vrt Aluksne-1989-1185-47.xyz