#!/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 613.5 1071.1199333703498 29.5 60 -gcp 6297.0 963.3148250971683 30 60 -gcp 6431.976480842531 8564.022700221425 30 59.66666667 -gcp 682.5 8625.408939478068 29.5 59.66666667 001/krievija/O-35-12.jpg O-35-12.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "613.5 1071.1199333703498\n6297.0 963.3148250971683\n6431.976480842531 8564.022700221425\n682.5 8625.408939478068" | \
  gdaltransform -tps -output_xy O-35-12.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O-35-12.vrt O-35-12.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O-35-12.cut.vrt O-35-12.xyz