#!/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 447.0 1338.0 24.5 58.333333333333336 -gcp 6612.0 1338.0 25 58.333333333333336 -gcp 6600.0 9012.0 25 58 -gcp 438.0 9078.0 24.5 58 001/O-35-62.jpg O-35-62.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "447.0 1338.0\n6612.0 1338.0\n6600.0 9012.0\n438.0 9078.0" | \
  gdaltransform -tps -output_xy O-35-62.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-35-62.vrt O-35-62.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-35-62.cut.vrt O-35-62.xyz