#!/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 1362.0 198.0 24.837216666666666 55.75 -gcp 12528.0 309.0 25.337216666666666 55.75 -gcp 12444.0 10125.0 25.337216666666666 55.5 -gcp 1191.0 10020.0 24.837216666666666 55.5 bruno/Lietuva/Q19_1917.jpg Q19_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1362.0 198.0\n12528.0 309.0\n12444.0 10125.0\n1191.0 10020.0" | \
  gdaltransform -tps -output_xy Q19_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Q19_1917.vrt Q19_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Q19_1917.cut.vrt Q19_1917.xyz