#!/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 2064.0 2862.0 26.276666666666667 56 -gcp 25482.0 2877.0 26.726666666666667 56 -gcp 25614.0 26604.0 26.726666666666667 55.75 -gcp 1956.0 26619.0 26.276666666666667 55.75 bruno/VIII-21_1915.jpg VIII-21_1915.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2064.0 2862.0\n25482.0 2877.0\n25614.0 26604.0\n1956.0 26619.0" | \
  gdaltransform -tps -output_xy VIII-21_1915.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VIII-21_1915.vrt VIII-21_1915.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VIII-21_1915.cut.vrt VIII-21_1915.xyz