#!/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 342.0 1320.0 23.502166666666668 56.8693 -gcp 8322.0 1293.0 23.566583333333334 56.86938333333333 -gcp 8355.0 9306.0 23.5668 56.83375 -gcp 318.0 9339.0 23.503166666666665 56.83358333333334 112_Kalncem_Dezember_1916.jpg 112_Kalncem_Dezember_1916.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "345.0 222.0\n9438.0 261.0\n9411.0 9549.0\n318.0 9540.0" | \
  gdaltransform -tps -output_xy 112_Kalncem_Dezember_1916.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  112_Kalncem_Dezember_1916.vrt 112_Kalncem_Dezember_1916.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 112_Kalncem_Dezember_1916.cut.vrt 112_Kalncem_Dezember_1916.xyz