#!/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 21.507898464275 56.59613067242 -gcp 12309.0 0.0 21.499149799347 56.564968746932 -gcp 12309.0 13854.0 21.435806751251 56.570312359052 -gcp 0.0 13854.0 21.444754600525 56.601484135841 Aizpute-1988-991/Aizpute-1988-991-60.jpg Aizpute-1988-991-60.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "559.5 2682.0\n10257.0 915.0\n12021.0 10653.0\n2322.0 12405.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-60.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-60.vrt Aizpute-1988-991-60.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-60.cut.vrt Aizpute-1988-991-60.xyz