#!/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 153.0 72.0 26.337216666666666 56.25 -gcp 5664.0 45.0 26.837216666666666 56.25 -gcp 5679.0 4998.0 26.837216666666666 56 -gcp 186.0 5010.0 26.337216666666666 56 bruno/T17 1917_Wyschki-1.bmp T17 1917_Wyschki-1.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "153.0 72.0\n5664.0 45.0\n5679.0 4998.0\n186.0 5010.0" | \
  gdaltransform -tps -output_xy T17 1917_Wyschki-1.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  T17 1917_Wyschki-1.vrt T17 1917_Wyschki-1.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES T17 1917_Wyschki-1.cut.vrt T17 1917_Wyschki-1.xyz