#!/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 21.50652050971985 56.51283784579663 -gcp 10506.0 0.0 21.50602528362807 56.48598783030959 -gcp 10506.0 12132.0 21.450333539592993 56.486354501145584 -gcp 0.0 12132.0 21.45103883369185 56.51303392830071 Aizpute-1988-991/Aizpute-1988-991-3.jpg Aizpute-1988-991-3.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "216.0 861.0\n10077.0 486.0\n10440.0 10404.0\n573.0 10767.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-3.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-3.vrt Aizpute-1988-991-3.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-3.cut.vrt Aizpute-1988-991-3.xyz