#!/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 2964.0 1383.0 22 57.75 -gcp 17070.0 1341.0 22.333333333333332 57.75 -gcp 17148.0 21195.0 22.333333333333332 57.5 -gcp 2970.0 21216.0 22 57.5 k_001_ktl2-1-85_25.jpg k_001_ktl2-1-85_25.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2964.0 1383.0\n17070.0 1341.0\n17148.0 21195.0\n2970.0 21216.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_25.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_25.vrt k_001_ktl2-1-85_25.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_25.cut.vrt k_001_ktl2-1-85_25.xyz