#!/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 2304.0 2871.0 23.5 56.666666666666664 -gcp 16737.0 2916.0 23.75 56.666666666666664 -gcp 16662.0 20418.0 23.75 56.5 -gcp 2169.0 20373.0 23.5 56.5 mapster/O-34-132-A_(IELGAVA)_1932_greif.jpg O-34-132-A_(IELGAVA)_1932_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2304.0 2871.0\n16737.0 2916.0\n16662.0 20418.0\n2169.0 20373.0" | \
  gdaltransform -tps -output_xy O-34-132-A_(IELGAVA)_1932_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-34-132-A_(IELGAVA)_1932_greif.vrt O-34-132-A_(IELGAVA)_1932_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-34-132-A_(IELGAVA)_1932_greif.cut.vrt O-34-132-A_(IELGAVA)_1932_greif.xyz