#!/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 21.449813329204 56.55538112618 -gcp 10506.0 0.0 21.449195397674 56.52834940817 -gcp 10506.0 12429.0 21.39200091362 56.528589676299 -gcp 0.0 12429.0 21.39182752301 56.555415804241 Aizpute-1988-991/Aizpute-1988-991-34.jpg Aizpute-1988-991-34.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "18.0 1155.0\n9871.5 829.5\n10185.0 10740.0\n319.5 11049.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-34.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-34.vrt Aizpute-1988-991-34.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-34.cut.vrt Aizpute-1988-991-34.xyz