#!/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 753.0 1305.0 24.5 57.333333333333336 -gcp 6540.0 1260.0 25 57.333333333333336 -gcp 6567.0 8844.0 25 57 -gcp 738.0 8859.0 24.5 57 001/O-35-98.jpg O-35-98.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "753.0 1305.0\n6540.0 1260.0\n6567.0 8844.0\n738.0 8859.0" | \
  gdaltransform -tps -output_xy O-35-98.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-35-98.vrt O-35-98.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-35-98.cut.vrt O-35-98.xyz