#!/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 2934.0 1368.0 20.876666666666665 56 -gcp 18507.0 1548.0 21.326666666666668 56 -gcp 18306.0 17010.0 21.326666666666668 55.75 -gcp 2751.0 16845.0 20.876666666666665 55.75 bruno/VIII-9_w.y.jpg VIII-9_w.y.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2934.0 1368.0\n18507.0 1548.0\n18306.0 17010.0\n2751.0 16845.0" | \
  gdaltransform -tps -output_xy VIII-9_w.y.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VIII-9_w.y.vrt VIII-9_w.y.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VIII-9_w.y.cut.vrt VIII-9_w.y.xyz