#!/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 26.95977330207825 57.63547779539142 -gcp 10485.0 0.0 26.95979475975037 57.608848362136 -gcp 10485.0 13272.0 26.896301507949833 57.60868743461295 -gcp 0.0 13272.0 26.89661264419556 57.635604145298345 Aluksne-1989-1185/Aluksne-1989-1185-58.jpg Aluksne-1989-1185-58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "978.0 990.0\n9474.0 978.0\n9444.0 9414.0\n987.0 9420.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-58.vrt Aluksne-1989-1185-58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-58.cut.vrt Aluksne-1989-1185-58.xyz