#!/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 21.34915520352 56.575620569883 -gcp 11763.0 0.0 21.341770435551 56.545866470544 -gcp 11763.0 13722.0 21.278817834555 56.550131842963 -gcp 0.0 13722.0 21.285875373024 56.580178498666 Aizpute-1988-991/Aizpute-1988-991-46.jpg Aizpute-1988-991-46.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "249.0 2520.0\n9976.5 891.0\n11619.0 10662.0\n1845.0 12271.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-46.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-46.vrt Aizpute-1988-991-46.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-46.cut.vrt Aizpute-1988-991-46.xyz