#!/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 306.0 567.0 26.726666666666667 55.75 -gcp 12246.0 579.0 27.176666666666666 55.75 -gcp 12327.0 12255.0 27.176666666666666 55.5 -gcp 300.0 12255.0 26.726666666666667 55.5 bruno/IX-22_1927_IX.jpg IX-22_1927_IX.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "306.0 567.0\n12246.0 579.0\n12327.0 12255.0\n300.0 12255.0" | \
  gdaltransform -tps -output_xy IX-22_1927_IX.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  IX-22_1927_IX.vrt IX-22_1927_IX.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES IX-22_1927_IX.cut.vrt IX-22_1927_IX.xyz