#!/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 26.712272363662724 57.50439747714489 -gcp 10530.0 0.0 26.711412001426687 57.47798991066754 -gcp 10530.0 10668.0 26.66142324829102 57.478770257120686 -gcp 0.0 10668.0 26.6633651676178 57.505437932672145 Aluksne-1989-1186/Aluksne-1989-1186-161.jpg Aluksne-1989-1186-161.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1053.0 1005.0\n9486.0 1080.0\n9399.0 9594.0\n978.0 9543.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-161.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-161.vrt Aluksne-1989-1186-161.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-161.cut.vrt Aluksne-1989-1186-161.xyz