#!/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 26.64946704769135 57.488521240578805 -gcp 10578.0 0.0 26.64992838764191 57.46146195721616 -gcp 10578.0 10584.0 26.60074234342575 57.461096999548836 -gcp 0.0 10584.0 26.599849167823795 57.48787532596936 Aluksne-1989-1186/Aluksne-1989-1186-3.jpg Aluksne-1989-1186-3.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 1041.0\n9486.0 993.0\n9515.25 9511.5\n1113.0 9539.625" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-3.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-3.vrt Aluksne-1989-1186-3.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-3.cut.vrt Aluksne-1989-1186-3.xyz