#!/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 21.4624668810302 56.51258487988575 -gcp 10509.0 0.0 21.46028632456322 56.48587745349834 -gcp 10509.0 12486.0 21.40316135220291 56.48725271127216 -gcp 0.0 12486.0 21.404880568719047 56.51420150746128 Aizpute-1988-991/Aizpute-1988-991-5.jpg Aizpute-1988-991-5.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "177.0 1182.0\n10044.0 723.0\n10494.0 10632.0\n633.0 11085.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-5.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-5.vrt Aizpute-1988-991-5.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-5.cut.vrt Aizpute-1988-991-5.xyz