#!/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 26.8981146812439 57.67085009289627 -gcp 10485.0 0.0 26.898490190505985 57.64482075935245 -gcp 10485.0 13260.0 26.837557554194326 57.64468120948939 -gcp 0.0 13260.0 26.837078765206847 57.67001803912329 Aluksne-1989-1185/Aluksne-1989-1185-16.jpg Aluksne-1989-1185-16.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "999.0 981.0\n9483.0 984.0\n9471.0 9405.0\n972.0 9411.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-16.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-16.vrt Aluksne-1989-1185-16.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-16.cut.vrt Aluksne-1989-1185-16.xyz