#!/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 2874.0 1419.0 27.666666666666668 57.25 -gcp 12264.0 1425.0 28 57.25 -gcp 12318.0 14571.0 28 57 -gcp 2805.0 14559.0 27.666666666666668 57 k_001_ktl2-1-85_122.jpg k_001_ktl2-1-85_122.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2874.0 1419.0\n12264.0 1425.0\n12318.0 14571.0\n2805.0 14559.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_122.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_122.vrt k_001_ktl2-1-85_122.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES k_001_ktl2-1-85_122.cut.vrt k_001_ktl2-1-85_122.xyz