Hi all, I think with r609 there should be no need to use a polygon file. See https://www.mkgmap.org.uk/websvn/revision.php?repname=splitter&rev=609 Please let me know when this version produces much worse results compared to older releases (using the same options and input) and provide the files densities-out.txt and the log. If you are interested in good splits you should check the splitter log for "Solution is not nice. Can't find a better solution" When this is printed splitter did not find a good split. Expect almost empty tiles in this case. It is likely that this happens when rather small files are split with a polygon and the default resolution. Normal users don't do this, but some map providers try to use the same options for very different downloads ... Gerd