#!/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 21.553585497421 56.576556220907 -gcp 10509.0 0.0 21.555944919088 56.549943236677 -gcp 10509.0 12090.0 21.500287055969 56.548306491658 -gcp 0.0 12090.0 21.498146653175 56.575099686609 Aizpute-1988-991/Aizpute-1988-991-55.jpg Aizpute-1988-991-55.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6.0 6966.0\n177.0 888.0\n10014.0 1138.5\n9754.5 11029.5\n4.5 10758.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-55.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-55.vrt Aizpute-1988-991-55.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-55.cut.vrt Aizpute-1988-991-55.xyz