#!/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 1432.5 1738.658774373259 24.5 57 -gcp 12883.5 1714.6036211699163 25 57 -gcp 12905.25 12149.533286908078 25 56.75 -gcp 1408.5 12186.12451253482 24.5 56.75 48-Ogre_1940.jpg 48-Ogre_1940.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1432.5 1738.658774373259\n12883.5 1714.6036211699163\n12905.25 12149.533286908078\n1408.5 12186.12451253482\" | \
  gdaltransform -tps -output_xy 48-Ogre_1940.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  48-Ogre_1940.vrt 48-Ogre_1940.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 48-Ogre_1940.cut.vrt 48-Ogre_1940.xyz