I use this script to automatically update my rendered Minecraft map with pigmap

update_map.sh

#!/bin/bash

if [ -f pigmap/output/pigmap.params ]
then
  find world/region/ -newer pigmap/output/pigmap.params > changes.txt
  date >> error_log && ./pigmap/pigmap -i world/ -o pigmap/output/ -g pigmap/images -r changes.txt -h 3 >> error_log && date >> error_log
else
  date >> error_log && ./pigmap/pigmap -B 6 -T 1 -Z 10 -i world/ -o pigmap/output/ -g pigmap/images -r changes.txt -h 3 >> error_log && date >> error_log
fi