#!/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 1536.0 1383.0 22.676666666666666 56.25 -gcp 17115.0 1410.0 23.126666666666665 56.25 -gcp 17127.0 16869.0 23.126666666666665 56 -gcp 1494.0 16881.0 22.676666666666666 56 bruno/VII-13_w.y.jpg VII-13_w.y.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1536.0 1383.0\n17115.0 1410.0\n17127.0 16869.0\n1494.0 16881.0" | \
  gdaltransform -tps -output_xy VII-13_w.y.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VII-13_w.y.vrt VII-13_w.y.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VII-13_w.y.cut.vrt VII-13_w.y.xyz