#!/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 26.98991060257 57.57471003619 -gcp 10485.0 0.0 26.988043785095 57.548767192591 -gcp 10485.0 10590.0 26.940016150475 57.549184557148 -gcp 0.0 10590.0 26.940686702728 57.575158751489 Aluksne-1989-1185/Aluksne-1989-1185-41.jpg Aluksne-1989-1185-41.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 1053.0\n9456.0 1038.0\n9444.0 9534.0\n1032.0 9528.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-41.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-41.vrt Aluksne-1989-1185-41.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-41.cut.vrt Aluksne-1989-1185-41.xyz