#!/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 27.02568054199219 57.425407401984295 -gcp 10506.0 0.0 27.024135589599613 57.39923107055137 -gcp 10506.0 10626.0 26.975834369659427 57.39960102098628 -gcp 0.0 10626.0 26.97695016860962 57.42589261425048 Aluksne-1989-1186/Aluksne-1989-1186-39.jpg Aluksne-1989-1186-39.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 1002.0\n1011.0 9525.0\n9483.0 9534.0\n9495.0 1020.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-39.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-39.vrt Aluksne-1989-1186-39.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-39.cut.vrt Aluksne-1989-1186-39.xyz