#!/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 21.308717798906 56.557219409126 -gcp 10770.0 0.0 21.310627244348 56.529680279321 -gcp 10770.0 12450.0 21.253348344385 56.528342603553 -gcp 0.0 12450.0 21.25120286455 56.555991288178 Aizpute-1988-991/Aizpute-1988-991-40.jpg Aizpute-1988-991-40.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "738.0 912.0\n10599.0 1101.0\n10407.0 11025.0\n547.5 10825.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-40.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-40.vrt Aizpute-1988-991-40.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-40.cut.vrt Aizpute-1988-991-40.xyz