#!/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 26.80230749498037 57.55550881320038 -gcp 10485.0 0.0 26.80113554186804 57.529137835344685 -gcp 10485.0 13350.0 26.73944128205933 57.529594759278886 -gcp 0.0 13350.0 26.73975706100464 57.556233104528296 Aluksne-1989-1185/Aluksne-1989-1185-124.jpg Aluksne-1989-1185-124.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1122.0 1008.0\n1041.0 9519.0\n9483.0 9597.0\n9564.0 1059.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-124.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-124.vrt Aluksne-1989-1185-124.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-124.cut.vrt Aluksne-1989-1185-124.xyz