#!/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 2604.0 1476.0 22.337216666666666 56.5 -gcp 17166.0 1404.0 22.837216666666666 56.5 -gcp 17256.0 14595.0 22.837216666666666 56.25 -gcp 2589.0 14673.0 22.337216666666666 56.25 bruno/L16_1918.jpg L16_1918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2604.0 1476.0\n17166.0 1404.0\n17256.0 14595.0\n2589.0 14673.0" | \
  gdaltransform -tps -output_xy L16_1918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  L16_1918.vrt L16_1918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES L16_1918.cut.vrt L16_1918.xyz