#!/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 21.440093509174897 56.51327461974144 -gcp 10857.0 0.0 21.437309696598778 56.48547284204514 -gcp 10857.0 12480.0 21.37979084203756 56.48685679190018 -gcp 0.0 12480.0 21.38245127299898 56.514584809125964 Aizpute-1988-991/Aizpute-1988-991-6.jpg Aizpute-1988-991-6.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "255.0 1173.0\n10116.0 663.0\n10620.0 10566.0\n762.0 11070.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-6.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-6.vrt Aizpute-1988-991-6.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-6.cut.vrt Aizpute-1988-991-6.xyz