#!/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 21.507110595703 56.619651867864 -gcp 10614.0 0.0 21.509095430374 56.592665768902 -gcp 10614.0 12492.0 21.45184636116 56.590952652481 -gcp 0.0 12492.0 21.448928117752 56.618046232646 Aizpute-1988-991/Aizpute-1988-991-80.jpg Aizpute-1988-991-80.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "237.0 1125.0\n10107.0 1176.0\n10053.0 11079.0\n159.0 11013.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-80.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-80.vrt Aizpute-1988-991-80.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-80.cut.vrt Aizpute-1988-991-80.xyz