#!/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 2928.0 1407.0 25 58 -gcp 16893.0 1374.0 25.333333333333332 58 -gcp 16986.0 21147.0 25.333333333333332 57.75 -gcp 2928.0 21177.0 25 57.75 k_001_ktl2-1-85_64.jpg k_001_ktl2-1-85_64.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2928.0 1407.0\n16893.0 1374.0\n16986.0 21147.0\n2928.0 21177.0" | \
  gdaltransform -tps -output_xy k_001_ktl2-1-85_64.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  k_001_ktl2-1-85_64.vrt k_001_ktl2-1-85_64.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_64.cut.vrt k_001_ktl2-1-85_64.xyz