#!/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 21.318497657776 56.660159737367 -gcp 10563.0 0.0 21.318165063858 56.632990166835 -gcp 10563.0 11952.0 21.262536048889 56.633084580466 -gcp 0.0 11952.0 21.262827583228 56.660288422931 Aizpute-1988-991/Aizpute-1988-991-99.jpg Aizpute-1988-991-99.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "220.5 931.5\n496.5 10833.0\n10377.0 10524.0\n10057.5 610.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-99.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-99.vrt Aizpute-1988-991-99.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-99.cut.vrt Aizpute-1988-991-99.xyz