#!/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 21.468529701233 56.640448115878 -gcp 10923.0 0.0 21.471480131149 56.612490916362 -gcp 10923.0 12582.0 21.413125991821 56.610749177081 -gcp 0.0 12582.0 21.410046815872 56.638725366195 Aizpute-1988-991/Aizpute-1988-991-87.jpg Aizpute-1988-991-87.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "780.0 894.0\n10668.0 1263.0\n10293.0 11154.0\n403.5 10776.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-87.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-87.vrt Aizpute-1988-991-87.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-87.cut.vrt Aizpute-1988-991-87.xyz