#!/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 21.427459716797 56.681976773005 -gcp 10506.0 0.0 21.427416801453 56.654746260971 -gcp 10506.0 12012.0 21.371240615845 56.654728586454 -gcp 0.0 12012.0 21.371240615845 56.681906062171 Aizpute-1988-991/Aizpute-1988-991-116.jpg Aizpute-1988-991-116.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "312.0 969.0\n10161.0 903.0\n10227.0 10788.0\n369.0 10863.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-116.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-116.vrt Aizpute-1988-991-116.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-116.cut.vrt Aizpute-1988-991-116.xyz