#!/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 21.387505531311 56.596475697685 -gcp 10536.0 0.0 21.386979818344 56.569342998745 -gcp 10536.0 12390.0 21.32962346077 56.569543965728 -gcp 0.0 12390.0 21.329687833786 56.596605641969 Aizpute-1988-991/Aizpute-1988-991-65.jpg Aizpute-1988-991-65.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "30.0 1071.0\n9888.0 798.0\n10155.0 10717.5\n289.5 10980.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-65.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-65.vrt Aizpute-1988-991-65.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-65.cut.vrt Aizpute-1988-991-65.xyz