#!/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 26.77104492759705 57.442436584121374 -gcp 10749.0 0.0 26.770594316482544 57.41560168499511 -gcp 10749.0 10818.0 26.720313829422 57.41539370193276 -gcp 0.0 10818.0 26.72131161117554 57.44274839600094 Aluksne-1989-1186/Aluksne-1989-1186-142.jpg Aluksne-1989-1186-142.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1281.0 987.0\n9699.0 1188.0\n9477.0 9678.0\n1053.0 9486.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-142.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-142.vrt Aluksne-1989-1186-142.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-142.cut.vrt Aluksne-1989-1186-142.xyz