#!/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 327.0 528.0 25.826666666666668 56 -gcp 12159.0 525.0 26.276666666666667 56 -gcp 12168.0 12243.0 26.276666666666667 55.75 -gcp 297.0 12243.0 25.826666666666668 55.75 bruno/VIII-20_1922.jpg VIII-20_1922.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "327.0 528.0\n12159.0 525.0\n12168.0 12243.0\n297.0 12243.0" | \
  gdaltransform -tps -output_xy VIII-20_1922.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VIII-20_1922.vrt VIII-20_1922.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VIII-20_1922.cut.vrt VIII-20_1922.xyz