#!/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 21.370189189911 56.618415170437 -gcp 10731.0 0.0 21.371734142303 56.590769523581 -gcp 10731.0 12486.0 21.313589215279 56.589909974388 -gcp 0.0 12486.0 21.312065720558 56.617349644355 Aizpute-1988-991/Aizpute-1988-991-74.jpg Aizpute-1988-991-74.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "432.0 1164.0\n10293.0 1164.0\n10296.0 11061.0\n402.0 11035.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-74.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-74.vrt Aizpute-1988-991-74.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-74.cut.vrt Aizpute-1988-991-74.xyz