#!/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 27.020897676852865 57.62140725325772 -gcp 10485.0 0.0 27.021786085448113 57.595113939912174 -gcp 10485.0 13332.0 26.957992534878276 57.594079165534005 -gcp 0.0 13332.0 26.95832176165358 57.621433133672596 Aluksne-1989-1185/Aluksne-1989-1185-87.jpg Aluksne-1989-1185-87.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1044.0 1005.0\n972.0 9507.0\n9405.0 9549.0\n9468.0 1056.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-87.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-87.vrt Aluksne-1989-1185-87.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-87.cut.vrt Aluksne-1989-1185-87.xyz