#!/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 21.567578315735 56.554610393586 -gcp 10548.0 0.0 21.566022634506 56.528003870911 -gcp 10548.0 12369.0 21.509245634079 56.528855945558 -gcp 0.0 12369.0 21.511209011078 56.555662912785 Aizpute-1988-991/Aizpute-1988-991-29.jpg Aizpute-1988-991-29.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "444.0 1077.0\n810.0 10971.0\n10545.0 10605.0\n10518.0 6531.0\n10290.0 696.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-29.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-29.vrt Aizpute-1988-991-29.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-29.cut.vrt Aizpute-1988-991-29.xyz