#!/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 21.52512614459 56.53546199868 -gcp 10704.0 0.0 21.523290995762 56.508363535215 -gcp 10704.0 12342.0 21.466733468135 56.509465698848 -gcp 0.0 12342.0 21.468439870931 56.536759561136 Aizpute-1988-991/Aizpute-1988-991-26.jpg Aizpute-1988-991-26.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "256.5 1021.5\n786.0 10915.5\n10656.0 10375.5\n10093.5 459.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-26.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-26.vrt Aizpute-1988-991-26.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-26.cut.vrt Aizpute-1988-991-26.xyz