#!/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 26.959236860275716 57.48442896568628 -gcp 10506.0 0.0 26.95855021476746 57.45804668524971 -gcp 10506.0 10512.0 26.909374594688728 57.458410271983205 -gcp 0.0 10512.0 26.909320950508018 57.484988376870675 Aluksne-1989-1186/Aluksne-1989-1186-52.jpg Aluksne-1989-1186-52.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1023.0 966.0\n9483.0 1005.0\n9426.0 9420.0\n964.5 9382.5" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-52.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-52.vrt Aluksne-1989-1186-52.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-52.cut.vrt Aluksne-1989-1186-52.xyz