#!/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 21.544471419565 56.554768038014 -gcp 10854.0 0.0 21.543793581668 56.527204993172 -gcp 10854.0 12486.0 21.486489772797 56.527571907886 -gcp 0.0 12486.0 21.487219333649 56.55518987559 Aizpute-1988-991/Aizpute-1988-991-30.jpg Aizpute-1988-991-30.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "336.0 1266.0\n469.5 11161.5\n10332.0 11022.0\n10179.0 1095.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-30.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-30.vrt Aizpute-1988-991-30.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-30.cut.vrt Aizpute-1988-991-30.xyz