#!/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 21.350212097168 56.638878764905 -gcp 10512.0 0.0 21.350855827332 56.611758805231 -gcp 10512.0 12165.0 21.294261217117 56.611605296258 -gcp 0.0 12165.0 21.293649673462 56.638465766956 Aizpute-1988-991/Aizpute-1988-991-92.jpg Aizpute-1988-991-92.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "255.0 948.0\n10107.0 864.0\n10185.0 10785.0\n324.0 10848.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-92.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-92.vrt Aizpute-1988-991-92.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-92.cut.vrt Aizpute-1988-991-92.xyz