#!/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 1287.0 1308.0 25.826666666666668 58 -gcp 12420.0 1359.0 26.276666666666667 58 -gcp 12429.0 12981.0 26.276666666666667 57.75 -gcp 1194.0 12957.0 25.826666666666668 57.75 bruno/0-20_1917.jpg 0-20_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1287.0 1308.0\n12420.0 1359.0\n12429.0 12981.0\n1194.0 12957.0" | \
  gdaltransform -tps -output_xy 0-20_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  0-20_1917.vrt 0-20_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 0-20_1917.cut.vrt 0-20_1917.xyz