#!/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 21.46552125901779 56.65998282430364 -gcp 10503.0 0.0 21.464527132385896 56.633326164789636 -gcp 10503.0 12309.0 21.407577034777127 56.633740134892264 -gcp 0.0 12309.0 21.408742822786067 56.66054714899833 Aizpute-1988-991/Aizpute-1988-991-105.jpg Aizpute-1988-991-105.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "273.0 1014.0\n615.0 10893.0\n10498.5 10526.25\n10119.0 643.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-105.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-105.vrt Aizpute-1988-991-105.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-105.cut.vrt Aizpute-1988-991-105.xyz