If that's a general request I tend to just map whatever takes my interest at the time (mostly admin boundaries).

If you have a specific question or need help with something you can always ask, although it'd be better to do so by direct messaging rather than commenting on changesets.

I don't know what you mean. What is the "PiS era"? What looks divided? Which canal? (Vistula Spit canal? Kaliningrad sea-canal/Königsberger Seekanal?)

You need to be *much* more specific than that. The HRE spanned almost 1000 years so "clean up the HRE borders" is... unhelpful.

As to East Prussia specifically, maybe, kind-of, for a bit, but its status was ambiguous.

If you're referring specifically to [relation 2858903 – Holy Roman Empire (1300-1400)](https://www.openhistoricalmap.org/relation/2858903) then it is simply wrong, and not just in Prussia. It claims to be based on Droysen's [Deutschland im XIV. Jahrhundert](https://commons.wikimedia.org/wiki/File:Deutschland_im_XIV._Jahrhundert.jpg) but deviates from it substantially, to the point of uselessness, so it should probably just be deleted. It was created by user [Bookmark](https://www.openhistoricalmap.org/user/Bookmark), not me.

They aren't all civil parishes. Civil parishes were introduced in 1845 so any that pre-date that are ecclesiastical parishes (presumably Church of Scotland)

Yeah, it's just a placeholder for time period and has never had boundaries. There's a note tag saying as much. Originally it spanned 1201-1797 but as I have worked back from 1797 and added more iterations I have pushed back the end date. Eventually it should either be deleted or represent a specific narrower time-span. At the moment it is as much for the chronology as anything, but also gives somewhere to keep "notes" (mark down dates of changes not yet implemented) and to hold the imperial circle/Bohemian crown relations. 1659-1678 (https://www.openhistoricalmap.org/relation/2830620) is also currently boundary-less due to complications with the Spanish Netherlands.