#!/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 26.800942285431965 57.53445615501386 -gcp 10485.0 0.0 26.80229459874666 57.50813671854329 -gcp 10485.0 13350.0 26.740606706487814 57.50722204314314 -gcp 0.0 13350.0 26.739323055384357 57.53339737510226 Aluksne-1989-1185/Aluksne-1989-1185-122.jpg Aluksne-1989-1185-122.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1101.0 1023.0\n1011.0 9528.0\n9453.0 9621.0\n9546.0 1077.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-122.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-122.vrt Aluksne-1989-1185-122.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-122.cut.vrt Aluksne-1989-1185-122.xyz