#!/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 4167.0 1752.0 25.337216666666666 57.25 -gcp 25548.0 1452.0 25.837216666666666 57.25 -gcp 25938.0 21114.0 25.837216666666666 57 -gcp 4413.0 21396.0 25.337216666666666 57 nr/KdwR-LC_R13_Serben.jpg KdwR-LC_R13_Serben.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4167.0 1752.0\n25548.0 1452.0\n25938.0 21114.0\n4413.0 21396.0" | \
  gdaltransform -tps -output_xy KdwR-LC_R13_Serben.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_R13_Serben.vrt KdwR-LC_R13_Serben.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_R13_Serben.cut.vrt KdwR-LC_R13_Serben.xyz