#!/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 1152.0 963.0 24.926666666666666 57.5 -gcp 12717.0 951.0 25.376666666666665 57.5 -gcp 12768.0 12765.0 25.376666666666665 57.25 -gcp 1110.0 12825.0 24.926666666666666 57.25 bruno/II-18_1917.jpg II-18_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1152.0 963.0\n12717.0 951.0\n12768.0 12765.0\n1110.0 12825.0" | \
  gdaltransform -tps -output_xy II-18_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  II-18_1917.vrt II-18_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES II-18_1917.cut.vrt II-18_1917.xyz