#!/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 26.612810688972477 57.422110611977274 -gcp 10506.0 0.0 26.61270876502991 57.39538132650422 -gcp 10506.0 10554.0 26.562857431411746 57.394936214615406 -gcp 0.0 10554.0 26.562422913551334 57.42190551482594 Aluksne-1989-1186/Aluksne-1989-1186-189.jpg Aluksne-1989-1186-189.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1089.0\n9504.0 1053.0\n9516.0 9474.0\n1035.0 9510.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-189.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-189.vrt Aluksne-1989-1186-189.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-189.cut.vrt Aluksne-1989-1186-189.xyz